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 The stages used to position the apertures will have positioning precision < 10 µm and angular precision of < 1 mrad. Attenuator Some experiments require a local attenuator for calibration and to prevent damage to sensitive components during alignment. The local attenuator will have a design very similar to the solid attenuator located upstream in the Front End Enclosure (see Section 9.2.2.1). Beam Intensity Monitors Beam intensity monitors are required to measure the absolute flux incident on the samples and the amount of flux transmitted through the samples. These monitors will be of the ion chamber type described in the facility diagnostics section (Section 9.4.2.3). Sample Chamber The sample chamber in Hutch A2 will be instrumented for studies required to characterize the interaction between the FEL pulse and matter. In addition to sample holders and photon spectrometers, it will include electron and ion time-of-flight spectrometers. Beam Stop At the back end of Hutch A2 is an insertable beam stop with integral burn-through detector. 9.2.2.4 Hutch A4 Hutch A4 will initially be used for commissioning diagnostics, which will be housed in a diagnostics tank. See Section 9.4.2. Fixed Mask and Beam Stop At the back end of Hutch A4 is an insertable beam stop with integral burn-through detector. Behind the beam stop is a fixed mask with 4.5 mm diameter aperture, identical to the fixed masks in the Front End Enclosure. As with those masks, its purpose is to cut the divergence of the spontaneous radiation, so that all transmitted radiation remains within the beam pipe. The coherent FEL radiation cannot strike this mask, and so peak power is not a concern. 9.2.2.5 Inter-Hall Transport A beam pipe connects the two main halls through a tunnel. It is about 250 m long. Access will be available along the length of the tunnel. In the center of the tunnel, a diagnostics tank will permit beam intensity and position measurements. 9.2.2.6 Hutch B1 The first hutch in Hall B will contain optical elements, which condition the x-ray beam for the Hall B experiments (see Figure 9.14). Only one such element will be included in the initial <strong>LCLS</strong>, though space is made available for future optics. Hall B is intended primarily for experiments, which prefer to be far from the source, in order to reduce the peak intensity or to allow focusing to a minimum spot size. 9-20 ♦ — R A Y B E A M T R A N S P O R T A N D D I A G N O S T I C S
Figure 9.14 Experimental Hall B Monochromator 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 Some Hall B experiments will require a bandwidth narrower than the intrinsic bandwidth of the FEL. In Hall B, standard monochromator crystals such as silicon or diamond should not suffer any damage due to the peak power, and so standard crystal monochromator designs can be used [12]. Spools, Chambers, and Beam Stop Hutch B1 contains a diagnostics chamber for diagnostics associated with adjustment of the monochromator. It also contains several spool pieces, which may in future be replaced by additional mirror systems and monochromators. At the back end of Hutch B1 is an insertable beam stop with integral burn-through detector. 9.2.2.7 Hutch B2 Hutch B2 will house <strong>LCLS</strong> experiments. It will also contain beam-conditioning optics, which need to be close to the experiments, in particular, focusing systems with short focal length. Hutch B2 will also contain an optics tank with an x-ray pulse splitter and delay system, producing from each FEL pulse a pair of x-ray pulses with adjustable sub-ns delay. X - R A Y B E A M T R A N S P O R T A N D D I A G N O S T I C S ♦ 9-21
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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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Magnet String Location Existing, Ne
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8.1 Overview 8.1.1 Introduction L C
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Mu in the pole, for mu
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Gasload (Torr-l/sec-cm) (x10 -12 )
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8.10.4 Conclusion L C L S C O N C E
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Page 372 and 373: L C L S C O N C E P T U A L D E S I
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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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