Transcript X-Ray Commissioning Overview

FEE/FEL Commissioning Overview
By Hal Tompkins
Photon Beam Systems Deputy
Presentation to the Facility Advisory
Committee
June 16, 2008
June 16, 2008
FEE/FEL Commissioning
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Hal Tompkins
[email protected]
Outline
Commission FEE Instruments
Offset mirror commissioning
SASE optimization
AMO experiment alignment
User Operations at ~4 GeV
June 16, 2008
FEE/FEL Commissioning
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Hal Tompkins
[email protected]
Related Presentations
Paul Emma, Commissioning Results and Plans
H.D. Nuhn, LTU and Undulator Commissioning Plans
Richard Bionta, FEE Diagnostics and Commissioning
John Bozek, AMO Instrument
June 16, 2008
FEE/FEL Commissioning
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Hal Tompkins
[email protected]
First Light
in FEH
CD-4 (7/31/2010)
X-Rays in NEH
FEH Hutch BO
FEH Install
First Light
in FEE
Und. Seg. Install
PPS Cert. LTU/Dump
FEE/NEH Install
LTU/Und/Dump Install
now
PEP-II run ends
LCLS Installation and Commissioning Time-Line
PPS
J F M AM J J A S ON D J F MAM
AM J J A S ON D J F M A M J J
Down
2008
2009
2010
Linac/BC2
Commissioning
June 16, 2008
FEE/FEL Commissioning
Re-commission
Inj/BC2 to SL2
LTU/Und
NEH Operations/
Comm.
FEE Commissioning
Comm.
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June 16, 2008
Hal Tompkins
[email protected]
June 16, 2008
FEE/FEL Commissioning
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Hal Tompkins
[email protected]
Readiness Reviews
FEE/NEH Beam Readiness Reviews to be held in MarchApril 2009 time frame
AMO Experiment Readiness Review in June-July 2009
X-Ray Tunnel/FEH Beam Readiness Reviews to be held in
November-December 2009 time frame
June 16, 2008
FEE/FEL Commissioning
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Hal Tompkins
[email protected]
FEE Commissioning - Initial Conditions
Start with single undulator
13.6 GeV electrons
0.2 nanocoulombs
10 Hz
June 16, 2008
FEE/FEL Commissioning
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Hal Tompkins
[email protected]
FEE Instrument Commissioning
5/15 to 6/25
Conduct FEE Beam readiness review in Mar.-Apr., 2009
Open Dump stoppers, RP initial survey (1-2 d)
Insert Direct Imager, check upstream apertures (1-2 d)
Commission adjustable slits (1-2 d)
Insert all undulators, 13.6 GeV electrons, RP survey (2-3 d)
Insert gas attenuator apertures, check alignment (1-2 d)
Commission gas attenuator/solid attenuators (1-2 d)
Center reticule on beam, project through C1 (1-2 d)
Decide if OMS realignment is necessary (+/- 1mm range)
(0-5 d)
June 16, 2008
FEE/FEL Commissioning
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Hal Tompkins
[email protected]
FEE Instrument Commissioning (cont.)
Commission gas detectors (2-4 d)
apertures inserted
add gas
power magnet
compare APD & PMT response to attenuation
Commission K-monochromator (4-6 d)
Transmit beam through 4 bounces (~8.172 eV)
Checkout quadrant photodiode (keep intensity low)
Measure x-ray energy, undulator bandwidth
Measure photon flux (part of CD4 goals) (1 d)
June 16, 2008
FEE/FEL Commissioning
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Hal Tompkins
[email protected]
Offset Mirrors
6/26 to 7/16
Tune linac for appropriate energy
Begin with soft x-ray offset mirror system (SOMS)
Insert M1S, use P1 to set angle, translation (2-4 d)
Insert M2S, use P2S to set angle, translation (1-2 d)
Insert M3S2, use P3S2 to set angle, translation (1-2 d)
Retract M3S2 and insert M3S1, use P3S1 to set angle,
translation (1-2 d)
Retract M1S and apply same procedure to HOMS (3-5 d)
Priority is SOMS for hutch 2 - delivers beam to AMO
experiment
June 16, 2008
FEE/FEL Commissioning
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Hal Tompkins
[email protected]
June 16, 2008
FEE/FEL Commissioning
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Hal Tompkins
[email protected]
June 16, 2008
FEE/FEL Commissioning
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Hal Tompkins
[email protected]
Offset Mirrors (cont.)
Open hutch stoppers to AMO experiment
RP surveys - insure full intensity through C4S2
Begin AMO experiment alignment
June 16, 2008
FEE/FEL Commissioning
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Hal Tompkins
[email protected]
SASE Optimization
7/17 to 8/13
Change linac to 4.52 GeV (nominal 908 eV), check beam
center with K-mono (keep intensity low, 1-2 d)
Switch to direct imager, look for FEL (should be able to see
signals ≥100 nJ)
If unable to find FEL, measure undulator K values
Change linac back to 13.56 GeV, 10 Hz
Use K-mono to measure spectrum (3-5 d)
Optimize SASE (vary bunch compression, emittance, RF,
BBA, etc.)
Above 50 J, imager saturates, need gas attenuator
June 16, 2008
FEE/FEL Commissioning
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Hal Tompkins
[email protected]
SASE Optimization (cont.)
If FEL reaches ~0.1-1.0 mJ, commission calorimeter (3-5 d)
Need to limit linac to 10 Hz
Once calorimeter is commissioned, cross-calibrate the gas
detectors and the direct imager (2-3 d)
Measure position stability
Electron energy stability already < 0.1% (at end of linac)
During off-hours, deliver beam to AMO experiment
June 16, 2008
FEE/FEL Commissioning
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Hal Tompkins
[email protected]
AMO Experiment
HF Physics chamber will be in place by May 1, 2009
Laser will be ready at the same time
Commissioning of laser transport to AMO exp. begins
Diagnostics chamber to be in place June, 2009
KB optics delivered in May or June, 2009
Begin aligning KB optics, HF physics chamber, and
diagnostics chamber in mid-July
June 16, 2008
FEE/FEL Commissioning
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Hal Tompkins
[email protected]
Summary
Very tight schedule between first beam to FEE and User
Run - driven by FY08 budget limitations.
Very tight schedule between AMO experiment installation
and User Run - driven by FY08 budget limitations.
We think the goal of achieving lasing at 1.5 nm by Aug.Sep., 2009 is reasonable
Experiments in Fall, 2009 are not part of CD 4 goals
June 16, 2008
FEE/FEL Commissioning
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Hal Tompkins
[email protected]