Transcript X-Ray Transport / Optics / Diagnostics Overview

X Ray Transport, Optics, and
Diagnostics, Overview
Facility Advisory Committee
Meeting
October 12-13, 2004
This work was performed under the auspices of the U.S. Department of Energy by the University of California, Lawrence Livermore National Laboratory under
Contract No. W-7405-Eng-48.
October 12, 2004
XTOD Overview
UCRL-PRES-XXXXX
Richard M. Bionta
[email protected]
Outline
Overall Scope
General Goals
Technical Highlights
Risks
Plans including the Continuing Resolution
Conclusions
October 12, 2004
XTOD Overview
UCRL-PRES-XXXXX
Richard M. Bionta
[email protected]
XTOD Transports Photons from e- Dump
to FEH
Electron
Dump
Linac
Far
Experimental
Hall
Undulator
Hall
Electron
Transport
October 12, 2004
XTOD Overview
Front End
Enclosure
Near
Experimental
Hall
X-Ray
Tunnel
UCRL-PRES-XXXXX
Richard M. Bionta
[email protected]
PPS
Muon
shield
1.5 Scope: Front End
Enclosure/ Near
Experimental Hall
NEH
PPS
Flipper Mirror
Front End Enclosure
Slit A
Comissioning:
Spectrometer,
Total Energy
Solid
Attenuator
Photon
Beam
Slit B
Direct Imager
Indirect Imager
Gas Attenuator
Fast
close
valve
Electron
Beam
October 12, 2004
XTOD Overview
Muon
shield
Electron Dump
UCRL-PRES-XXXXX
Richard M. Bionta
[email protected]
FEH
Pulse Split and Delay
1.5 Scope: NEH,
Tunnel, FEH
X-Ray Beam Transport
Tunnel
System
Monochrometer
Far Hall Direct
Imager and Tank
NEH
Flipper Mirror
October 12, 2004
XTOD Overview
UCRL-PRES-XXXXX
Richard M. Bionta
[email protected]
XTOD Goals
Provide vacuum path from end of undulator to
hutches in Far Hall with capability of attenuating
beam to synchrotron levels.
Provide necessary diagnostics to commission the
LCLS and monitor its performance.
Detect X-Ray Photons in Far Hall.
Demonstrate detection and optical techniques that
would be useful to users.
October 12, 2004
XTOD Overview
UCRL-PRES-XXXXX
Richard M. Bionta
[email protected]
Main Imaging Diagnostic:
Scintillator/Microscope
Advantages
Adjustable
resolution to 
1 mm.
X-Ray sensor
decoupled
from CCD
CCD
Camera
Microscope
Objective
Disadvantage
X-ray beam
LSO or YAG:Ce crystal prism assembly
October 12, 2004
XTOD Overview
UCRL-PRES-XXXXX
Placed directly
in beam
Richard M. Bionta
[email protected]
Indirect Imager sees low intensity
reflection
Be
Isolation
valve
Direct Imager
(Placed directly in
beam)
Indirect
Imager
(Sees only a low
intensity reflection)












Turbo pump
October 12, 2004
XTOD Overview
UCRL-PRES-XXXXX
Richard M. Bionta
[email protected]
Gas and Solids Provide Attenuation
Solid
Attenuator
Gas Attenuator
Autocad
Use Gas
Use Solids
* For a transmission of 10-4
October 12, 2004
XTOD Overview
UCRL-PRES-XXXXX
Richard M. Bionta
[email protected]
XTOD Risks
Technical risks listed in registry include attenuator
performance and instrument backgrounds
(mitigated by modularity, redundancy and
placement)
Funding profile requires significant design and
even conceptual design efforts required when
funding commences (CR may help)
Designs and concepts based on theoretical
calculations of beam characteristics (current work)
October 12, 2004
XTOD Overview
UCRL-PRES-XXXXX
Richard M. Bionta
[email protected]
Detailed modeling will continue to be our
major near term effort
Expected LCLS beam profile contains FEL and Spontaneous halo
2-3 mJ
FEL
3 mJ High
energy core
Eg > 400 keV
20 mJ
Spontaneous
At entrance to NEH, FEL tuned to 8261 eV Fundamental
October 12, 2004
XTOD Overview
UCRL-PRES-XXXXX
Richard M. Bionta
[email protected]
Spontaneous halo has rich spectral and
spatial structure
20 mm
20 mm
0 < E < 10 keV
7.6 < E < 9.0 keV
10 < E < 20 keV
20 < E < 27 keV
Near-Field Spontaneous Radiation Patterns in FEE, at position of
gas attenuator (88 m from End-of-Undulator)
October 12, 2004
XTOD Overview
UCRL-PRES-XXXXX
Richard M. Bionta
[email protected]
We are beginning to calculate detector
responses to LCLS beam
Horizontal LineOut
20
15
10
5
0
-5
-10
-15
-20
-60
PhotoElectrons/Pixel
Y, mm
Fluence
-40
-20
0
X, mm
100,000
50,000
0
20
40
60
-50 -40 -30 -20 -10 0 10 20 30 40 50 60
X, mm
Direct imager exposed to full 8 keV FEL + Spontaneous through solid
attenuator
October 12, 2004
XTOD Overview
UCRL-PRES-XXXXX
Richard M. Bionta
[email protected]
XTOD WBS Organized by Function
1.5 XTOD
.1 Mgmt.
.2 Ctrls.
Controls for
all
instruments
October 12, 2004
XTOD Overview
.3 Mech&Vac.
Pumps, pipes,
and stands
between
instrument
tanks, by room
.4 Optics
.5 Diagnostics
Masks
Slits
Flipper Mrr.
Gas Atten.
Solid Atten.
Optic Tank
Monochrom
Split & Delay
Simulation
Direct Imager
Indirect Imager
Diagnostic Tanks
Spectrometer
Calorimeter
Coherence
Shape
UCRL-PRES-XXXXX
.6 Install
Installation
of all
vacuum and
instruments
Richard M. Bionta
[email protected]
Schedule emphasizes early completion of commissioning diagnostics
2004
2005
2006
2007
2008
Con trols
M ech an ical an d V acu u m
Front End Enclosure(FEE)
Near Experimental Hall
T unnel
#
Far Experimental Hall
#
F acility O p tical S ystem s
Fixed Mask FEE
Slits/Collimator A FEE
Slits/Collimator B FEE
Gas Attenuator FEE
Solid Attenuator FEE
Crystals an d G ratin g s
Crystal Monochromator FEH
Pulse Split and delay FEH
Diag n ostics
Modeling and Simulation
Direct Scintillator Imager
Indirect Imager
Imaging Diagnostic T ank
#
Comissioning Diagnostic T ank
#
T otal Energy Measurement
Spectrometer
October 12, 2004
XTOD Overview
UCRL-PRES-XXXXX
Richard M. Bionta
[email protected]
Activities planned during CR
Modeling and Simulation
Spontaneous / FEL simulation along beam line and during startup
Calculate Beam sizes and effects of apertures at Gas Attenuator,
Cameras, etc
Optimize response of detectors to simulated beam
Component R&D
Spectrometer
Total Energy
Damage
Mechanical & Vacuum
Gas Attenuator Calculations
October 12, 2004
XTOD Overview
UCRL-PRES-XXXXX
Richard M. Bionta
[email protected]
Activities after CR
Detailed Design of FEE in preparation for
construction in FY06
Mech. & Vac. through Near Hall
Slit
Direct Imager
R&D & Prototype
Gas attenuator
Total Energy
Spectrometer
Indirect Imager
October 12, 2004
XTOD Overview
UCRL-PRES-XXXXX
Richard M. Bionta
[email protected]
Summary
XTOD transports x-ray beam to users and provides optics
and diagnostics for LCLS commissioning and monitoring
Basic imaging diagnostics and attenuator systems
understood and supported by calculations and prototypes.
The development of the other instruments will proceed in a
serial fashion with priority given to commissioning
diagnostics
Beam models now exist allowing detailed modeling of the
instrumentation. This will proceed during the Continuing
Resolution.
XTOD will be ready for serious R&D and Engineering effort
after the CR in preparation for procurement and fabrication
in FY06
October 12, 2004
XTOD Overview
UCRL-PRES-XXXXX
Richard M. Bionta
[email protected]