LCLS Conceptual Design Report - Stanford Synchrotron Radiation ...

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L C L S C O N C E P T U A L D E S I G N R E P O R T Figure 8.20 Low–carbon steel screws can be installed as necessary and positioned at varying distances from the poles in order to adjust the undulator field locally. In conclusion, the following summarizes all of the design provisions that were made in order to achieve the high magnetic performance required for undulator segments. It is worth noting that the magnetic tolerance specifications for these segments are nearly an order of magnitude more stringent than those of the standard APS undulator "A". • Precise tuning and measurement capabilities are required in order to make a precision magnetic device. For this reason, the space between poles is completely open (pole and magnet clamps are located only inside the device). • For a very small fixed pole gap it becomes exceedingly complicated to use standard shims on top of the magnets to precisely tune the magnetic structure. Alternate provisions were made so that "push-pull" screws or a series of 2 micron increment shims can be used for tuning, greatly simplifying the process. • Side shims can be used for final tuning. • All components of the magnetic structure such as the poles, magnets, sidebars, and base plate have very precise mechanical tolerances. • Along the length of the undulator segment, the magnetic structure is divided into five sections. The three middle sections can be tuned manually and the end sections can be slightly bent from a remote location with sub-micron accuracy in order to taper the 8-34 ♦ U N D U L A T O R
L C L S C O N C E P T U A L D E S I G N R E P O R T undulator segment. Figure 8.21 PZT translator located at the end of the undulator segment to adjust the magnetic gap of the end section. This adjusts the phasing between undulator segments. Figure 8.22 Schematic View of the undulator segment and movers showing three of the cams on one end of the segment and two on the other end. • To ensure that the tight tolerances are met, each magnet and pole will be certified and a selective assembly procedure will be employed. The assembly will be performed in U N D U L A T O R ♦ 8-35
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Linac Coherent Light Source (LCLS)
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L C L S C O N C E P T U A L D E S I
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Preface This Conceptual Design Repo
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Table of Contents 1 Executive Summa
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6. Two experiment halls L C L S C O
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2.7.1.7 Conventional Facilities L C
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3 TECHNICAL SYNOPSIS Scientific Bas
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5 TECHNICAL SYNOPSIS FEL Parameters
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and the total peak beam power L C L
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5.4.2.2 Case II - High Charge Limit
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∆P ∆I sat pl / P / I sat pk L C
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5.9 Summary L C L S C O N C E P T U
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6 Injector TECHNICAL SYNOPSIS The i
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εn,x (µm) 4 3 2 1 4-2001 8560A95
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Quantum Yield (electrons/photon) 10
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Bz (T) 0.3 0.2 0.1 1-2002 8560A92 L
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Master Clock 9.917 MHz x8 x6 x6 Df
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1-2002 8560A198 Linac Center Line L
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B z (kG) 3 2 1 4-2001 8560A91 L C L
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γε x,y (µm) 3 2 1 0 3-2001 8560A
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γεx,y (µm) yn 10 0 -10 -10 0 10
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σ γ /γ 0 (percent) ∆N/N 0.02 0
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5 0 -5 5 0 -5 5 0 -5 L C L S C O N
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Table 6.5 PARMELA Output Parameters
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gama x (micro.m) 3 2 1 0 0 L C L S
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∆E/E 0 (%) ∆N/N 0 -1 -2 0.02 0
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〈∆E/E 0 〉 /% I pk /I pk0 0.1
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β (m) 35 30 25 20 15 10 5 0 K21_1B
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β (m) 60 50 40 30 20 10 0 L C L S
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economic reasons. L C L S C O N C E
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Phase [deg. S-band] L C L S C O N C
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New Solid-State Sub-Booster and Ele
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7.8.2 Bunch Length Diagnostics L C
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Page 286 and 287: L C L S C O N C E P T U A L D E S I
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Page 304 and 305: 8.1 Overview 8.1.1 Introduction L C
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Quad ∆X/µm Quad ∆Y/µm −500
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∆X/µm ∆Y/µm L C L S C O N C E
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8.13.2 Undulator Cell Structure L C
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9.2 Layout and Optics 9.2.1 Experim
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Fast Valve L C L S C O N C E P T U
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0.01 10 -4 10 -6 10 -8 10 -10 10 -1
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Table 9.5 Mirror requirements L C L
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Refractive Focusing System L C L S
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Pulse Split/Delay L C L S C O N C E
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Figure 9.20 LCLS Ion Chamber L C L
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9.4.3.2 Pulse Length L C L S C O N
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9.4.3.6 Divergence L C L S C O N C
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10 Conventional Facilities TECHNICA
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1-2002 8560A198 Linac Center Line L
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Figure 10.6 Near hall floor plan 10
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11 Controls TECHNICAL SYNOPSIS The
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11.5.3 Motion Controls L C L S C O
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12.1 Procedural Overview L C L S C
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13 Environment, Safety and Health a
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Table 13-1 Hazard Identification an
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13.1 Ionizing Radiation The design
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Table 13-2 Minimum Training Require
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13.10 SLAC References L C L S C O N
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L C L S D E S I G N S T U D Y R E P
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15 TECHNICAL SYNOPSIS Work Breakdow
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A A.1 FEL-Physics A.1.1 Performance
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A.2 Photo-Injector A.2.1 Gun-Laser
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A.2.3.2 Electron Beam L C L S C O N
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A.2.4.7 Vacuum L C L S C O N C E P
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A.3.8 DL-2 A.3.8.1 Subsystem L C L
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A.4 Undulator A.4.1 Undulator A.4.1
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B Control Points B.1 Injector Contr
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C Glossary ACO Anneaux Collisions O
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