Transcript CollbMtgPlenary_Shiltsev_April26_06.ppt

US LHC Accelerator Research Program
bnl - fnal- lbnl - slac
LARP Accelerator
Systems Overview:
How are we doing?
Vladimir Shiltsev
Content
• What’s new after October’05 Collaboration Meeting
– LARP Org Chart changes, communication, DocDB
– FY06 Budget – spendings to date
– RC review + Lumi Review
• DoE Review Nov’05  LARPAC May’06  DoE Review Jun’06
• R&D Progress:
– Instrumentation
– Commissioning
– Collimation
– Accelerator Physics
• New Proposals
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Accelerator Systems Org Chart
Changes: Wolfram to lead AP
V.Shiltsev
Accelerator Systems
Be discussed at this meeting:
• Finish some L3 tasks
• Introduce new L3 tasks
• any org structure for new
initiatives?
Instrumentation:
A.Ratti
Tune Feedback
(P.Cameron)
Commissioning:
M.Syphers
Beam Commiss-ing
Luminometer
(E.Harms)
(A.Ratti)
IR Coms-ing
Schottky Monitor
(M.Lamm)
(A.Jansson)
Collimators R&D:
T.Markiewicz
Efficiency Studies
(A.Drees)
Rotating Collim.
(T.Markiewicz)
Tertiary Collim
(N.Mokhov).
Irradiation Studies
Accel Physics:
W.Fischer
E-cloud
(M.Furman)
IR & Beam-Beam
(T.Sen)
Wire Compens’n
(T.Sen)
(N.Simos)
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Communication/Coordination
• Communication within LARP:
– VideoConf of all AS L2s+Steve ~once/mos
– One-on-one meetings (site visits, reviews, etc) ~once/qrtr
– Collaboration meetings ~twice/year
• Communication with CERN
– First “long-termers” (P.Limon et al)
– Visits (HC, BC, Instr, etc) >1/mos
– Workshops (e.g. TAN) and reviews (e.g. RC) ~once/qrtr
– US-CERN meetings ~ once/yr
• LARP Doc DB is functioning:
– 162 docs uploaded from Oct’05-Apr’06
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FY06 Accelerator Systems Budget
Pete got extra 150k$
to cover past
investments
BNL BC funds
redistributed to FNAL
and LBL  -60k$
RC hardware start
delayed  -350k$
Nick got extra +50k$
for PhII irradition
extra +30k$
To build BB-Wires
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Accel.Syst. Spendings
0.9M/3.6M=25%
thru 5 mos
Feb.28, 2006
(compare with
31% MAG)
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That tops the
list of my worries…
• Make sure that we achieve all milestones
– And spend $$ approx as planned
• Reviews
– Be prepared and pass numerous reviews (small and big one)
• Next year planning/budget
– Have clear understanding of what will we do next year
• New initiatives
– Should always have a healthy pressure of new proposals
– Now anticipate some $$ freed after diagnostics development
and fabrication finished in 2007
This collaboration meeting is to address all that:
– L2s will report Friday
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Speaking of Reviews: Nov’05 DoE
• “The review committee was very pleased with the presentations on beam
instrumentation and accelerator physics. In addition, they found the idea of
participation in the development of a remote control room a very interesting
possibility for enhancing interactions with CERN from afar via the Fermilab
project “LHC@FNAL”.
• Plans for commissioning of LHC hardware are already being implemented,
with the first U.S. staff member (Peter Limon) already stationed at CERN. It
was reported by management that U.S. laboratories will provide staffing for this
effort, and, in fact, FNAL has committed seven persons to this task. LARP and
CERN will cover costs of travel and additional living expenses in the Geneva
area.
• Finally, the committee again emphasized its displeasure with the lack of
formality in dealings of LARP, and strongly recommended a more effective
bookkeeping system for managing expenses and progress on all active tasks,
and a person who would be responsible for implementing such a system”.
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TCFB on RHIC ramp
P.Cameron
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Luminosity Monitor - I
• The only real-time bunch-by-bunch
luminosity measurement in the LHC
– 25 ns bunch spacing, 1%
resolution
• R&D phase has been completed
– Demonstrated 40 MHz performance
using ALS X-ray beamline
• Beam test planned for RHIC run VI
• System intragation planning at CERN
– TAN instrumentation workshop on March
10
• Final Design Review at LBL
• Monday April 24
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Luminosity Monitor - II
• Technical Challenges
– Extremely high radiation levels
• up to ~250 Grad
DAQ
TAN
– Signal processing to avoid pileup
• 25 ns bunch spacing
• Status
– Completed R&D and FDR
• Project Milestones:
–
–
–
–
Final Design Review (Apr 06)
System test at RHIC (Summer 06)
Four systems complete (Winter 06-07)
Installation and integration support (07)
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FE electronics
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LHC 4.8 GHz Schottky Design
R.Pasquinelli
A.Jansson
• Remarkable Progress:
– Final drawings ready for CERN
inspection
– Data acquisition issues –
discussed at Apr25 mtg at LBL
– Next revision of EDMS is needed
– Final Design Review 06/19/06 at
CERN
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LARP Hardware
Commissioning Tasks
Installation Oversight
Since DOE Review Last Fall:
• First USLHC String
(Q1-Q3/Feedbox/D1) transported
to tunnel
• LARP Oversight and technology
transfer for USLHC interconnects
• Transportation and Installation of
Second IR quad/DFBX/D1 on
going.
• Limited LARP oversight planned
for all US deliverable installations
Photos from Jan 2006 IR 8L installation
LARP Hardware
Commissioning Tasks
Commissioning of US Deliverables and General HC
Proposed Profile for LARP Hardware Commissioners
7
CRYO
6
MAGNET
5
4
3
2
1
N
ov
Se
p
ly
Ju
ay
M
ar
M
n
Ja
N
ov
Se
p
ly
Ju
ay
M
ar
M
n
0
Ja
FTE/Month
8
N
ov
• LARP commissioners
receive “Project Associate”
status, join a CERN group
(AT/ACR or AT/MEL) for
nominally one year and
contribute to the groups
general HC responsibilities
as well as US deliverables.
• Short term HC support from
US experts as needed
Months Nov 2005-Dec 2007
• One commissioner stationed at CERN now. 3-4 additional to follow
in the fall of 2006.
• Peak participation coincides with anticipated peak commissioning
period FY07.
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Beam Commissioning Status
 Several US visitors to CERN in January/February 06
 Nearly continuous presence for ~6 weeks
 Chamonix workshop
 Beam Commissioning logistics
 Software
 CCC opening
 get to know LHC beam principals
 Informal review of LHC Beam Commissioning structure
completed
(results presented at this meeting)
 Beam Commissioning ‘Expression of Interest’
(to be introduced at this meeting)
 Refining areas of involvement, beginning to assign
names/share with CERN counterparts
 Gearing up for LARP presence during SPS running, more
so for Sector test
 More detail in Breakout session
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LHC@FNAL Status
 Committee’s work complete
 Endorsement received from
 Fermilab Directorate
 Affected Fermilab
Divisions/Sections (AD, PPD, CD,
FESS)
 LARP management
 CMS management
 Construction plans in
development
 Funds set aside/awaiting DOE
approval
 Center planned to be open in
September 2006
 More detail in Breakout
session
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Status of Phase II Rotating Collimator Project at
10-06-2005 Pheasant Run LARP Mtg.
• SLAC and CERN agree on an initial set of specifications for the first
mechanical prototype RC1
– Put a new vacuum tank with cylinder jaws that fits LHC spatial constraints
on a CERN Phase I base and use CERN Phase I scheme for jaw alignment
and cooling input
– Provide 12kW cooling to each 136mm x 95cm jaw through flexible tubing
– Relax 25um flatness tolerance but provide flexible jaw support and a central
stop mechanism to ensure thermal bowing is AWAY from beam
• 400 um sagitta for 1 hr beam lifetime engineering steady state
• 1200 um sagitta for 12min beam lifetime 10 second transient
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Progress since 10-06-2005
• RC1 Prototype Conceptual Design Report
– reviewed and accepted by CERN and suggestions
incorporated
– independent review 12/15/05
• Lou Bertolini-LLNL, Alex Makarov-FNAL, Bill Turner (LBL)
• Major Findings: Fine, but ….
– Do not ‘cut metal’ until jaw support and stop scheme developed
»
In progress
– Check thin-Cu over Stainless for performance √ No improvement
– Increase engineering effort
• Full time engineer (Steve Lundgren) and designer hired
3 April
• Current Activities:
–
–
–
–
Braze tests of cooling coils beginning
Prep for full cooling & deformation tests
Acquisition of Phase I support & mover assemblies
Redrawing of CERN parts for US fabrication
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FY06 Goals of Phase II Rotating
Collimator Project and Beyond
•
Work Plan outlined 10/6/2005
1.
2.
Single jaw thermal test: one jaw with internal helical cooling
channels to be thermally loaded for testing the cooling effectiveness
and measuring thermal deformations.
Full RC1 prototype: a working prototype for bench top testing of the
jaw positioning mechanism, supported to simulate operation in all
necessary orientations, but not intended for mounting on actual
beamline supports with actual beamline, cooling, control and
instrumentation connections.
1. Deliverables listed 10/6/2005
1.
2.
3.
Final version of RC1 CDR: Awaiting support/stopper design
External review of RC1 CDR: √
Performance report on RC1:
•
•
Progress delayed ~6 months due to reviews & manpower issues
New Plan: Slip schedule ~6 months
–
–
–
–
Single jaw tests, support/stopper design & write-up by EOFY06
RC1 performance report by mid FY07
$400k returned to LARP management in FY06 adjustment
Expect slippage of Jan 2008 beam-testable RC2 delivery consistent
with CERN’s latest schedule
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Material Irradiation Studies
assembly
irradiation
Post-irradiation
Analysis
PHASE-I: Irradiation and Analysis of 2D Carbon-Carbon at BNL
GOALS: Determine resilience of 2D CC against irradiation damage and assess
how the critical property of thermal expansion changes with irradiation
RESULT: PHASE-I 2D Carbon-Carbon self anneals irradiation ramage through thermal
cycling in both strong and weak directions. Therefore, it is expected to meet the 25
micron condition set as goal
Phase-II LHC Collimator Material Irradiation Planned for May 2006
•
•
Primary Materials: Annealed Copper and Glidcop (85% Cu – 15% Al)
Other Potential Candidates: Super Invar, Gum Metal, 3D Carbon-Carbon
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E-cloud since last Mtg
• Completed updated simulations of ecloud power deposition in LHC
dipoles
– M. Furman and V. Chaplin, PRST-AB 9, 034403 (March 20, 2006)
• Tedious exploration of parameter space with 2D code POSINST (see below)
– Peak SEY dmax now constrained to be <~1.2 for nominal intensity & bunch
spacing
– Code improvements
• 3D self-consistent code (WARP/POSINST)
–
–
–
–
Jean-Luc Vay (LBNL) now 20% LARP funded (starting FY06)
Initial qualitative results for one bunch in one FODO cell (LARP mtg, Apr. 05)
New results for a train of 5 bunches with more detailed model (see below)
Code improvements
• RHIC studies
– Feb. 2006: two CERN e– detectors installed (some not LARP funded, but
important)
• Common pipe region in IP10, warm section
– Polarized proton beams for this run
– Ping He doing RHIC simulations; calibration barely started
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Sample simulation: ecloud at LHC dipoles
(Furman and Chaplin, PRST-AB 9, 034403)
• ecloud power deposition
–
–
–
–
POSINST code
LHC arc dipole magnet
key parameters: Nb, tb, dmax

current result: dmaxmust be <1.2-
dP dz
tb=25 ns
1.3 (achievable but not easy)
tb=25 ns
Nb=1e11
tb=75 ns
1.15e11
: cooling capacity available for EC power deposition
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Sample 3D self-consistent simulations
(WARP/POSINST)
(courtesy J.-L. Vay)
•LHC FODO cell
• can now follow batch of bunches
with photo- e– and secondary e–
• snapshot from run with 5
bunches:
WARP/POSINST-3D
T = 0.3s
• Benchmark code against HCX experiment
(LBNL)
• expt. and sim. agree quantitatively on
characteristics of e– oscillations observed in
magnetic quadrupole flooded with electrons:
WARP/POSINST-3D
T = 4.65s
Electrons bunching
experiment
simulation
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Oscillations
Beam ions
hit end
plate
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Future Plans
• 3D self-consistent simulations:
– Study long-term behavior of beam
• This is a nontrivial exercise that may require code improvements
• Main new concern: slow emittance growth (Benedetto et. al.
PRSTAB 8 124402 (2005) et. seq.)
• Also: address “old” concern” (ecloud-induced head-tail
instability)
• Summer student to come to LBNL for 12 weeks this
summer
– Simulate optimal conditioning scenario for LHC
– Understand leftover details from SPS measurements
– Contribute (time permitting) to 3D self-consistent
simulations
• RHIC:
– Analyze collected data obtained with CERN detectors
– Complete simulations
– Understand ecloud sensitivities and correlate them to other
observables (eg., P rise)
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IR Layouts
Baseline Layout
Quads first
Too many parasitics
Dipoles first layout
Early separation
but ….
Triplets
Doublets
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IR Optics Issues
IR Magnet apertures and fields
Pole tip
field [T]
Quads 1st
Dipoles 1st: triplets
Dipoles 1st: doublets
10
11
10
Aperture [mm]
101
107
104
Energy Deposition
Major issue in all optics, but dipole designs more challenging.
Beam-beam interactions
Demonstration of wire compensation would favor quads 1st.
Chromaticity and Nonlinear Correctors
Corrector strengths lower with quads 1st but independent control of 2 beams with
dipoles 1st.
Luminosity gain with lower L*
Larger gain with quads 1st.
Flux jumps in IR magnets
Chromaticity jumps small (~2 units) with Δb3 = 1 in both optics if spurious dispersion in
IR is controlled to ~1cm at IP. Nonlinear effects need to be studied
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Beam-beam experiments, simulations
• RHIC beam-beam experiments in April 2006
Motivation: Test of wire compensation in 2007
Determine if a single parasitic at top energy causes beam losses
that need to be compensated. Similar experiment done last year
at injection energy - found strong effects at separations ≤ 6σ.
2 experiments done so far – April 5th, April 12th
Analysis to be presented by W. Fischer
• Beam-beam simulations of 2006 experiments
Motivation: Tests and improvements of codes, predictions of
observations in 2006 and of wire compensation
Four groups
FNAL: V. Ranjbar, T. Sen; SLAC: A. Kabel; LBL: J. Qiang;
University of Kansas: J. Shi
Website: http://www-ap.fnal.gov/~tsen/RHIC
for information exchange and results
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Beam-beam simulation results
Kansas
No sextupoles
Relative Lifetime
LBL
Emittance growth
FNAL
SLAC
Losses
BBSIM (VR, TS) simulations for lifetime
show a linear dependence on separation
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RHIC long-range beam-beam compensator design
In CY06 – construct and install a wire
compensator in RHIC, downstream of Q3 in29
LARP Collaboration Meeting
04/26/2006 - Shiltsev
IR6
New Initiatives to discuss
• AC dipole
• dB/B measurements
• Crystal collimation
• Super-SyncLite
• e-lenses for Head-on B-B Compensation
• Crab cavities
• 1.5TeV Injector in LHC tunnel LER-LHC
• Optical Stochastic Cooling
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Common questions to answer
• Title/subject
• Leader and participants
• Objectives
• Deliverables
• Time scale/schedule
• Resources needed:
– Add’l man-power (and type eng, phys, techs)
– $$ Travel
– $$ Labor
– $$ M&S and Equipment
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Work hard and be inventive!
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Slides
Back Ups
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Wire Beam-Beam Compensation
Overall Plan
• FY2006:
– Design and construct a wire compensator
– Install wire compensator in RHIC in summer 2006, downstream
of Q3 in IR6
– Perform theoretical studies to test the compensation and
robustness
• FY2007:
– Study the wire compensation in RHIC with 1 proton bunch in each
beam and nominal conditions at flat top and 1 parasitic interaction.
– Beam studies to test tolerances on: beam-wire separation
compared to beam-beam separation, wire current accuracy and
current ripple
• FY2008:
– Decide on scope of work for the LHC wire compensation
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Detail of flex cooling
supply tube
Stub-shaft (bearing not shown)
Contiguous with helical tube inside jaw.
Formed after assembly-brazing of jaw
and installation of bearing on stub-shaft
Exits through support shaft per CERN
design
Material: CuNi10Fe1, 10mm O.D.,
8mm I.D.
Relaxed
(as shown)
Support shaft
full 360° rotation
#
coils
4
O.D.
111mm (4.4in)
# coils
5
O.D.
91mm (3.6in)
torque
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9.1N-m (81in-lb)
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1.3 LHC Collimation R&D
• L2 Leader:
• FY06 budget
• Goals:
Tom Markiewicz (SLAC)
850 k$
– The LHC cleaning system must have exceptional efficiency to
meet its design parameters, significantly beyond the state-ofthe-art that is achieved in existing colliders. It is crucial for the
success of the LHC that different paths are explored in order to
optimize the design, hardware and operational procedures for
the LHC collimation system. In view of the exceptional difficulty
for the LHC it is essential to pursue parallel R&D studies in- and
outside of CERN. The phased approach for the LHC collimation
system will allow to test various proposals and to implement
the best solutions in an already defined upgrade path to
nominal performance. The LHC Collimator R&D will complement
the work at CERN and will be performed in close
• L3 tasks:
–
–
–
–
Cleaning Efficiency Studies
Rotating Collimators R&D
Tertiary Collimators Studies
Material Irradiation Studies
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1.3.1 Cleaning Efficiency Studies
• L3 Leader:
• FY06 budget
• Goals:
Angelika Drees (BNL)
50 k$
– The ultimate goal of this sub program is to bench mark
code(s), in particular SIXTRACKwColl, in a variety of
aspects with RHIC beams.
– We plan to install and implement at BNL accelerator
tracking code identical with the one used at CERN (K2,
SIXTRACK with Collimators, i.e. SIXTRACKwColl) and
perform simulations of collimation efficiencies and loss
maps which will then be compared to simulation results
from earlier studies done at RHIC with other codes
(Teapot, K2, ACCSIM) and with data. Various data sets at
two energies are available.
– During the RHIC proton run collimator setup procedures
should be implemented into the RHIC control system
and tested with beam under real operating conditions.
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Cleaning Efficiency Studies: Overall
Plan
• FY2006:
– debug the code
– compare with other simulation and data, test
setup procedures,
– finish reports
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1.3.2 Rotating Collimators
• L3 Leader:
• FY06 budget
• Goals:
Tom Markiewicz (SLAC)
720 k$
– The ultimate goal is a successful design for low
impedance, high efficiency LHC secondary collimators.
The design will be validated with a sufficient but small
(1-3) number of prototypes and beam tests. The design
specifications and the prototypes are the primary
deliverables. The time scale is set by the desirability of
testing the prototypes with LHC beam in 2008/09. Then,
CERN will decide whether or not to proceed with the
rotating collimator design. If a decision is made to
proceed, this sub-project will provide an engineering
drawing package to CERN and will support the effort to
commission the collimators once they are manufactured
and installed by CERN.
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• Attendees
June 15-17 CERN/SLAC
Collaboration Meeting
– CERN: Ralph Assmann (Project Leader, Tracking),
Allesandro Bertarelli (Mechanical Eng.), Markus Brugger
(Radiation Issues), Mario Santana (FLUKA)
– SLAC: Tom Markiewicz, Eric Doyle (ME), Lew Keller
(FLUKA), Yunhai Cai (Tracking), Tor Raubenheimer
• Radiation Physics Group: Alberto Fasso, Heinz Vincke
• Results
– Agreement on basic design of RC1 (1st rotatable
prototype)
– Transfer of many of CERN mechanical CAD files
– Lists of
• Further studies required
• Outstanding Engineering Issues requiring more design work
• Project Milestone List & Action Items List
– Test Installation of “New FLUKA”
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Conceptual Design of RC1 (1 of 2)
• Mechanics must fit within CERN Phase I C-C envelope
•
– 224mm center-to-center with 88mm OD beampipes
– 1480mm longitudinal flange-to-flange
– 25mm adjustment/jaw (22.5mm relative to beam w/±5mm
allowed beam center motion
and use Phase I alignment and adjustment scheme
– Two 75cm Cu cylindrical jaws with 10cm tapered ends, 95cm
overall length with axes connected to vertical mover shafts
– 136mm OD with 9mm taper
– Each jaw end independently moved in 10um steps
– Vacuum vessel sized to provide 8mm clearance to adjacent
beam and allow gross/fine 0°, 45°, 90° positions
• Relaxed mechanical deformation specifications
– <25 um INTO beam guaranteed by adjustable mechanical
stop(s)
• Ride on groove deep enough to not be damaged in accident case
• Adjustable between ±5 and ±15 sigma (2-6mm) & centered on beam
– <325 um (750um) AWAY FROM beam @ 0.8E1p/s loss
(4E11p/s)
• Flexible support on adjustment
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Proposed layout
136mm diameter x 950mm long jaws, vacuum tank,
jaw support mechanism and support base derived from CERN Phase I
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Adjustable gap-defining stop
•Stop prevents gap closing as
jaw bows inward due to heat
•Jaw ends spring-loaded to the
table assemby … move outward
in response to bowing
•May use two stops to control tilt
•Slot deep enough to avoid
damage in accident
•Stop far enough from beam to
never be damaged & is out of
way at injection
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RF Contact Overview
Spring loaded fingers ground two jaws
through range of motion
Rigid round-square transition
Jaw support & gap adjustment
borrowed from CERN
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LHC Phase I 2D carbon-carbon Irradiation
Specimen at BNL BLIP Facility
117 MeV or 200 MeV BNL LiNAC Protons
(depending on the isotope production requirements
downstream)
Preliminary Assessment:
2D CC specimens normal to the planes of reinforcing fibers and close to the center of
the beam (receiving high dose) experienced degradation.
Less degradation was seen in the specimens along the reinforcement. 
NOTE: Total dose received MUCH HIGHER than what LHC collimator jaws will see.
Status:
Phase I Carbon-Carbon irradiation completed
Sample activation measurements completed
Thermal Expansion of specimens started
PLANNING of FY06 Post-Irradiation and Follow-up
Irradiation Studies
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Phase-II LHC Collimator Material Irradiation Planned for May 2006
Primary Materials:
Annealed Copper and
Glidcop (85% Cu –
15% Al)
Other Potential
Candidates: Super
Invar, Gum Metal,
Also:
2D Carbon-Carbon
and 3D CarbonCarbon
Test for physical properties (thermal
conductivity, thermal expansion)
And
Stress-Strain (mechanical properties)
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POST IRRADIATION ANALYSIS REVEALED THAT PHASE-I 2D Carbon-Carbon Self
Anneals Irradiation Damage through thermal cycling in both strong and weak
directions. Therefore, it is expected to meet the 25 micron condition set as goal
Annealing along strong (fiber plane) direction
Annealing along weak direction
Shown is annealing under different levels of
irradiation damage
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PHASE-I: Irradiation and Analysis of 2D Carbon-Carbon at BNL
GOALS: Determine resilience of 2D CC against irradiation damage and assess
how the critical property of thermal expansion changes with irradiation
Beam exposure and
irradiation damage assessment
assembly
irradiation
Post-irradiation
Analysis
At irradiation levels several orders
of magnitude than what the LHC collimator
jaws will see the 2D CC suffers structurally
from irradiation exposure
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Physics: Long Range @ RHIC
SPS
: t ~ d5
Tevatron: t ~ d3
RHIC
: t ~ d4 or d2
[measured 11/09/04]
[measured in HEP stores, TEL]
[measured 04/28/05, scan 4]
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AC dipole
• Recent results
from the Tevatron
• Collaboration
formed including
Fermilab, BNL and
CERN.
• Formal proposal
for LHC at this
meeting
First AC dipole data in the Tevatron
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SyncLite Fiber: ghost bunches measurement
(DeSantis, Byrd, Zolotorev)
Electro-optic modulator
LHC Requirements
InGaAs PD
Fiberoptic
• Time resolution:
50 ps
• Max integration time:
10 s
Fiberoptic
Fiberoptic coupler/lens
• Sensitivity:
5 105 p
Fast pulser
50 ps @ 40 MHz
PC
Data acquisition board (ADC)
5 105 protons emit ~30 photons/turn in a 10% bandwidth.
The electro-optic modulator/fast pulser combination can map the entire LHC ring, with
the required resolution, every 500 orbits.
In the allowed integration time, every single 50 ps-long region is sampled 200 times.
A 70% QE photodiode would accumulate >4000 counts.
We can estimate a total of -6/8 dB from the coupling into the optical fiber and the
various insertion losses.
Main noise sources are the modulator extinction ratio (~ 3 10-3) and the photodiode dark
current (~ nA)
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New Initiatives: dB/B Fluctuations
Tevatron Stand-Alone Dipole
measurements (Proc. PAC’01)
Equivalent dB/B*
1E-5
1E-6
1E-7
LHC screen: light and feels
20 K He flow turbulence;
B-flux is constant at 3kHz
dB/B ~ dR/R  need
dR < 1A to blow horizontal
emittance
1E-8
1E-9
VLHC
1E-10
1E-11
LHC
10
100
1000
Frequency, Hz
Tev
10000
Can be measured at CERN
MMF and in Tev
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1.5 TeV SuperFerric Injector in LHC tunnel
J.Johnstone
T.Sen,
H.Piekarz
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1.2 LHC Commissioning
• L2 Leader:
• FY06 budget
• Goals:
Michael Syphers (FNAL)
1,140 k$
– There is an overall benefit to the U.S. high-energy physics
program if the LHC turns on rapidly and successfully. Our
experimental physics groups have invested heavily in the LHC
project, and the science produced there thus represents a
return on the U.S. investment. A healthy and strong HEP
activity at LHC will surely be necessary to secure future
accelerator-based HEP projects in the U.S. The information
gained during the commissioning will be available in a timely
manner and will have maximum positive effect on U.S. plans
for LHC
• L3 tasks:
–
–
–
–
Beam Commissioning
Hardware Commissioning
Toohig Fellowship
New Initiatives
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Schottky Monitors Overall Plan
• FY2006:
– S/N study of low intensity bunches in Tevatron
– Design pick-up structure, study PLL DAB board for DAQ
– complete an “integration document”, signed off by both
parties, and entered into CERN EDMS
– Design and build front-end electronics Q1
– Joint LARP and CERN review of the proposed design
• FY2007:
– Adapt Fermilab analysis software
– Hardware commissioning at CERN without beam
• FY2008:
– Hardware commissioning at CERN with beam
• FY2009:
– Beam studies of chromaticity measurements, ramp effects
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