Richard M. Bionta X-Ray Transport, Diagnostic, & Commissioning September 22, 2004 UCRL-PRES Two Problems... LCLS Diagnostics and Commissioning Workshop *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 and by Stanford University, Stanford Linear Accelerator Center under contract No. DE-AC03-76SF00515.

Gain Length Measurement

Richard M. Bionta X-Ray Transport, Diagnostic, & Commissioning September 22, 2004 UCRL-PRES How faint can FEL be? 1% FEL + Spontaneous directly into 25 mm LSO 14.5 GeV 0.01% FEL + Spontaneous into 25 mm LSO (X-Ray resolution  x  m)

Richard M. Bionta X-Ray Transport, Diagnostic, & Commissioning September 22, 2004 UCRL-PRES Camera Image Calculator Chain Spontaneous (E,P[x,y]) Spontaneous + FEL resampler Absorbed in 25  m LSO Photoelectrons in Camera (2.5 x Zeiss + SITEC CCD) Transmitted by Material x y E Spontaneous

Richard M. Bionta X-Ray Transport, Diagnostic, & Commissioning September 22, 2004 UCRL-PRES Gain Length Simulation Run separate spontaneous calculations at position of imagers for roll-away undulator senario. Current spatial binning good. Energy binning too fine. Run FEL simulations for previous cases. Use finer spatial binning (10 microns.) Put in same format as as spontaneous. Write re-sampler module for XTOD analysis chain to combine FEL and spontaneous at camera resolutions. Evaluate camera response

What fixed apertures will we allow?

Richard M. Bionta X-Ray Transport, Diagnostic, & Commissioning September 22, 2004 UCRL-PRES Fast close valve Slit A 13' Muon shield Gas Attenuator Solid Attenuator Slit B PPS 4' Muon shield Direct Imager Indirect Imager Comissioning: Spectrometer, Total Energy PPS Electron Beam Photon Beam Electron Dump Front End Enclosure NEH 1.5 Scope: Front End Enclosure/ Near Experimental Hall Flipper Mirror 83 m 112 m

Richard M. Bionta X-Ray Transport, Diagnostic, & Commissioning September 22, 2004 UCRL-PRES Spontaneous Fluence at NEH Hutch 1 Te = 4.5 GeV Z = 243 m  x = 1.0 mm  y = 0.3 mm 1.85 mJ Te = 14.5 GeV Z = 243 m  x = 0.3 mm  y = 0.1 mm 18.2 mJ 2” 4”

Richard M. Bionta X-Ray Transport, Diagnostic, & Commissioning September 22, 2004 UCRL-PRES Spontaneous with Vacuum Pipe Reflection 14.5 GeV4.5 GeV 4.5 GeV beam >10 cm diameter 14.5 GeV beam >4 cm diameter Near Hall, Hutch 1

Richard M. Bionta X-Ray Transport, Diagnostic, & Commissioning September 22, 2004 UCRL-PRES Setting apertures Strategy should be to allow as wide a beam possible during commissioning, then put in our custom Fixed Masks We need to generate 4.5 and 14.5 spontaneous radiation patterns at minimum apertures (muon shields, post undulator …) We need to understand aperture limits (radiation safety) and consequences (commissioning) and finalize

Richard M. Bionta X-Ray Transport, Diagnostic, & Commissioning September 22, 2004 UCRL-PRES Photon Energies > 400 KeV With pipe Without pipe