Donn H. McMahon XTOD Configuration Overview [email protected]October 24-26, 2005 UCRL-PRES-216590 X Ray Transport, Optics, and Diagnostics Overview FAC Photon Topical Oct. 27, 2005 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. Work supported in part by the DOE Contract DE-AC02-76SF00515. This work was performed in support of the LCLS project at SLAC.
X Ray Transport, Optics, and Diagnostics Overview. FAC Photon Topical Oct. 27, 2005. - PowerPoint PPT Presentation
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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.
Work supported in part by the DOE Contract DE-AC02-76SF00515. This work was performed in support of the LCLS project at SLAC.
FEL Offset System Has Been Incorporated in the XTOD Plan
Baseline cost & schedule have been definedThe FEE layout has been modifiedRadiation Physics analysis has defined critical components (e.g, collimators, shielding)Development Schedule
Determine mirror and other system specifications
Produce concept and corresponding engineering specification
VAT Series 77 Flap Shutter with Pneumatic ActuatorCloses to less than 30 mTorr*L/s within 15 msOpens to full size of beam pipe2,000 cycles to first service
Slow ValveVAT Series 48 All Metal Gate ValveSeals within 3 seconds20,000 cycles to first service
ControlsVAT VF-2 ControllerVAT High Vacuum SensorEPICS Compatible
Defines precision aperture of x-ray laserAble to choose any rectangular area inside clear aperture of fixed mask – 0.16 mm or larger10 micron linear resolutionBlocks aligns to beam axis within 29.5 arc-seconds
Compatible with high vacuum environmentOpens to clear aperture for diagnosticsCompatible with EPICS control system
Pressure history is calculated at eachsubvolume N for 100 hours
Model solves the gas load matrix withN coupled differential equations 4 times
Roughing from 760 to 0.01 Torr for 5 hrsTurbo pumping to below 10-5 Torr for 30 hoursIon pumping in the -6 range to 100 hoursFailure of ion pumps for few minutes
Gas Load Balance: Vn dpn/dt = Qn in – Qn out for n =1,NWhere Qn in = leakage and time-dependent outgassing into n
Qn out = Cnm (Pn -Pm) where m is an adjacent volume Or Qn out = (S Cnp / (S + Cnp) Pn
where Cnp is the conductance between n and the pumpand S (Pn) is the pressure dependent pump speed.
Methodology verified in experimentPressure gauges on APT at LANL verified the predictions
by the Mathematica model that was programmed to fit that geometry
The XTOD Work Plan Will Complete the Tunnel and Experimental Hall Mechanical & Vacuum Systems and
the 1st Half of FEE Systems in FY06FYO6 Efforts
Design mechanical and vacuum systems through tunnelDesign FEE up to Diagnostic Package (Fast Valve, Fixed Mask, Slit, Solid & Gas Attenuators, Ion Chambers)Complete conceptual designs for FEL Offset, TEM, Spectrometer, ImagersDesign XTOD Controls systems (details up to FEE Diagnostic Package and the Tunnel)Prototype Efforts for Gas Attenuator, Tunnel Vacuum System, and Total Energy Monitor (TEM)Complete Damage StudyContinue simulation efforts of physics models and to support engineering specificationsPrepare procurement package for all final design systems
FY07,FY08 EffortsFinal Design for FEE- Diagnostic Package and FEL Offset System (Nov 07)Complete XTOD ControlsProcure, Build, Test, and ship all systems to SLAC
(Beneficial Occupancy Dates: FEE-Oct. ’07, NEH-June ’07, Tunnel- Oct ’07, Sept ‘07)Refine simulation models and support commissioning activitiesXTOD Commissioning
Several Key XTOD Technical Documents/Specifications Have Been Completed
“LCLS Spontaneous Radiation with Reflection along the Beam Line in the Undulator Pipes “, Kirby Fong“The LCLS Gas Attenuator”, D.D. Ryutov“Photoluminescence as a way of non-destructive imaging at the LCLS facility”, D.D. Ryutov“Indirect Imager Requirements”, M. Pivovaroff“SiC Mirror Specifications”, M. Pivovaroff“Commissioning Diagnostics Specifications”, R. Bionta
FEE layout has stabilized including FEL Offset System
TTF Damage experiment has been conducted (SiC, B4C )
Significant progress on upstream FEE systems and Tunnel
Prototype efforts on the Total Energy Monitor are yielding promising results
Prototype efforts for Gas Attenuator to begin in November
Controls efforts are keeping pace developing entire XTOD system layouts, alignment of XTOD controls with LCLS standards, and installation of EPICS at LLNL