Transcript (slides)

Linac Coherent Light Source
Stanford Synchrotron Radiation Laboratory
Stanford Linear Accelerator Center
LCLS Technical Design Review,
TDR
LCLS Linac Proper
LCLS Linac TDR,
December 12, 2003
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Leif Eriksson - SLAC
[email protected]
Linac Coherent Light Source
Stanford Synchrotron Radiation Laboratory
Stanford Linear Accelerator Center
LCLS Linac Technical Review
Agenda :
Area Presentation of Area
Boundaries to LCLS Injector and LTU
Engineers and designers
Path from MAD to Layout
Path of information and how it relates to the project
Layout of L1 to L3
Scope of Work:
BC1 & BC2
Paul Emma’s slide
Motion diagram
First rough sketch
Visit to ANL - Problems with the APS bunch compressor – Bellows – Telescopic
vacuum chamber
Present design
Risk assessment
Moving components around
Sector 21 to sector 30
LCLS Linac TDR,
December 12, 2003
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Leif Eriksson - SLAC
[email protected]
Linac Coherent Light Source
Stanford Synchrotron Radiation Laboratory
Stanford Linear Accelerator Center
LI1 – LI3 layout
LCLS Linac begins sector 21.
The LCLS Injector Group
“owns” SLAC Linac sector 20.
The LCLS Linac Group
“owns” SLAC Linac sector 21
to sector 30
Leif Eriksson is the
Mechanical Engineer for the
LCLS Linac proper
Designer: Nick Braughton
Tim Montagne is the
Mechanical Engineer for the
LCLS
Designer: Stephan Davies
LCLS Linac TDR,
December 12, 2003
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Leif Eriksson - SLAC
[email protected]
Linac Coherent Light Source
Stanford Synchrotron Radiation Laboratory
Stanford Linear Accelerator Center
MAD TO LAYOUT
MAD Deck Symbols List MD Automated Layout program Straw-man figure layout
Paul Emma
Leif Eriksson/Nick Braughton
Area layout
Carl Rago/Paul Stephens
Component Layout
Leif Eriksson/Nick Braughton
Installation Dwgs
Example: Linac Sector 21, Bunch Compressor 1
BC1
See distributed hard copy for layout of additional sectors
LCLS Linac TDR,
December 12, 2003
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Leif Eriksson - SLAC
[email protected]
Linac Coherent Light Source
Stanford Synchrotron Radiation Laboratory
Stanford Linear Accelerator Center
LEUTL/APS Bunch compressor
Visit to ANL
Meet with Dr. Sushil Sharma & Al
Barcikowski
Problems with telescopic vacuum
chamber – excessive friction
Not needed for LCLS
Problems with race track shaped
bellows in the dipoles
Move bellows outside of dipoles?
Have dwg’s for APS Bunch
Compressor – Good model to
begin with
APC BC diagnostic assembly
spec’s currently evaluated by
Emma/Krejcik
LCLS Linac TDR,
December 12, 2003
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Leif Eriksson - SLAC
[email protected]
Linac Coherent Light Source
Stanford Synchrotron Radiation Laboratory
Stanford Linear Accelerator Center
LCLS Bunch Compressor 1 & 2, The Basics
Paul Emma’s picture
BPM critical for energy feedback (20 mm resolution)
offset: 17 to 30
cm (24 cm
nominal)
1st Sketch
Leif E
quadrupole screen collimator
LCLS Bunch Compressor, Motion Diagram
10/24/2003
NOT TO SCALE!
Beam Direction
Tweaker Quad A
Tweaker Quad B
Dipole C
Dipole B
Diagnostic
Bellow
Dipole D
Devices
Bellow
Bellow
Bellow
Stepper Motor +
Linear Actuator
Pivot Point X 4
Ball Slide X 2
LCLS Linac TDR,
December 12, 2003
Dipole A
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Leif Eriksson - SLAC
[email protected]
Linac Coherent Light Source
Stanford Synchrotron Radiation Laboratory
Stanford Linear Accelerator Center
LCLS Bunch Compressor 1 & 2, The Current Design
Design Status
See right hand-side pic
Cost well understood for LCLS
resource loaded schedule
Low to moderate risk for:
Technology
Cost
Schedule
Some additional issues for BC2:
Longer than BC1
Open issues:
Diagnostic package
LCLS Linac TDR,
December 12, 2003
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Leif Eriksson - SLAC
[email protected]
Linac Coherent Light Source
Stanford Synchrotron Radiation Laboratory
Stanford Linear Accelerator Center
Scope of Work: Sector 21, 22 & 23
Sector
Action
RF
21-1b and 21-1c disk-loadedwaveguides, DLWGs
Shortened from 10-foot sections
to 9.4-foot sections
40-foot DLWG at 21-2
Removed to make room for BC1
21-3a 10-foot DLWG
Removed to make room for BC1
Sector 22
Sector 23
50% of the power from klystron
21-3 will feed 21-3b; the power
feeds to 21-3c and 21-3d will
remain as they are (25% each)
Done for SLC in sector 2 (i.e.
2-4a,b,c); cells will be removed
from the downstream ends of the
structures, and the upstream
ends will remain located at their
present positions (there will be a
QA-type quadrupole and BPM
installed between 21-1b and
21-1c, and between 21-1c and
21-1d)
Linac quad LI21 201 and it's
associated BPM will be moved
1.066 m downstream of it's
present location; linac quad LI21
301 and it's associated BPM will
be moved 1.247 m downstream
of it's present location
The 21-2 modulator will be used
to power the X-band structure
immediately downstream of 21-1d
No Change
No Change
Technical risk
Low
Budgetary risk
Low to moderate
Schedule risk
Moderate
LCLS Linac TDR,
December 12, 2003
Comments
50% of the power from klystron
21-1 will feed 21-1b, while 21-1c
and 21-1d will each receive 25%
(this is the present power
feed arrangement, no change
necessary)
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Leif Eriksson - SLAC
[email protected]
Linac Coherent Light Source
Stanford Synchrotron Radiation Laboratory
Stanford Linear Accelerator Center
Scope of Work: Sector 24 & BC2
24-3d 10-foot DLWG
24-4d 10-foot DLWG
24-5d 10-foot DLWG
24-7 and 24-8 40-foot DLWGs +
all components in the 24-9 drift
space
LCLS Linac TDR,
December 12, 2003
Removed to make room for a
new SLC-style wire scanner just
upstream of quad LI24 401
50% of the power from klystron
24-3 will feed 24?3c; the power
feeds to 24-3a and 24-3b will
remain as they are (25% each)
Removed to make room for a new SLC 50% of the power from klystron
-style wire scanner just upstream of
24-4 will feed 24-4c; the power
of quad LI24 501; quad LI24 501 will feeds to 24-4a and 24-4b will
remain where it is
remain as they are (25% each)
Removed to make room for a new SLC 50% of the power from klystron 24-5
-style wire scanner just upstream of
will feed 24-5c; the power feeds to
quad LI24 601; quad LI24 601 will
24-5a and 24-5b will remain as they
remain where it is
are (25% each)
Removed to make room for BC2
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As was done for SLC in sector
28 (i.e. 28-1); quad LI24 401 will
remain where it is
Linac quad LI24 701 will remain where
it is; linac quad LI24 801 and it's
associated BPM will be relocated as
part of the BC2 installation; linac
quad LI24 901 and it's associated
BPM will be moved 2.604 m down
stream of it's present location
Leif Eriksson - SLAC
[email protected]
Linac Coherent Light Source
Stanford Synchrotron Radiation Laboratory
Stanford Linear Accelerator Center
Scope of Work: Sector 27 & 28
25-1b
25-1c (the old NPI injection point), One standard 10-foot DLWG will be
installed
25-5a 10-foot DLWG
Sector 26
27-6d 10-foot DLWG
28-7d 10-foot DLWG
28-5d
Removed to make room for an 8-foot
transverse deflecting structure just
downstream of quad LI25 501; quad
LI25 501 will remain where it is
The 24-8 klystron and modulator will
be used to power the transverse
deflecting structure at 25-5a
No Change
Removed to make room for a wire
50% of the power from klystron 27?6
scanner just upstream of quad LI27
will feed 27-6c; the power feeds to
701; quad LI27 701 will remain where 27-6a and 27-6b will remain as they are
it is; linac wire scanner LI28 44 will be (25% each)
moved from the 27-9 drift section to
this location
Removed to make room for a wire
50% of the power from klystron 28-7
scanner just upstream of quad LI28
will feed 28-7c; the power feeds to
801; quad LI28 801 will remain where 28-7a and 28-7b will remain as they are
it is; linac wire scanner LI28 544 will (25% each)
be moved from 28-5d to this location
Making 28-5 a standard 40-foot
Each of the 10-foot DLWG sections
accelerator section
(28?5a,b,c,d) will receive 25% of the
power from klystron 28-5
Sector 29
Sector 30
LCLS Linac TDR,
December 12, 2003
Each of the 10-foot DLWG
sections (25?1a,b,c,d) will receive
25% of the power from klystron
25-1
50% of the power from klystron 25-5
will feed 25-5b; the power feeds to
25-5c and 25-5d will remain as they
are (25% each)
All NPI components from the exit of
the 25-1b DLWG to immediately up
stream of linac quad LI25 201 will be
removed. Two NPI QA-type quadru
poles (NP25 units 154 and 156) will
then become available for use in BC1.
linac quad LI25 201 will
remain where it is
Making 25-1 a standard 40-foot
accelerator section
No Change
No Change
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Leif Eriksson - SLAC
[email protected]