Design and performance of a compact imaging system for the APS linac bunch compressor

Yang, Bingxin; Rotela, E.; Arnold, N.; Stein, Stephen J.; Berg, William J.; Sharma, S.

doi:10.1109/pac.2001.987370

Cited by 7 publications

(7 citation statements)

References 3 publications

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“…Hence many design decisions will be different from the traditional designs based on RS-170 analog television cameras. Throughout our discussion, we will use the APS bunch compressor camera [5] as an example of traditional design. That camera has the following features:…”

Section: Traditional Designmentioning

confidence: 99%

A Design Report for the Optical Transition Radiation Imager for the LCLS Undulator

Yang¹

2010

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The Linac Coherent Light Source (LCLS), a free-electron x-ray laser, is under design and construction. Its high-intensity electron beam, 3400 A in peak current and 46 TW in peak power, is concentrated in a small area (37 micrometer in rms radius) inside its undulator. Ten optical transition radiation (OTR) imagers are planned between the undulator segments for characterizing the transverse profiles of the electron beam. In this note, we report on the optical and mechanical design of the OTR imager. Through a unique optical arrangement, using a near-normal-incidence screen and a multi-layer coated mirror, this imager will achieve a fine resolution (12 micrometer or better) over the entire field of view (8 mm × 5 mm), with a high efficiency for single-shot imaging. A digital camera will be used to read out the beam images in a programmable region (5 mm × 0.5 mm) at the full beam repetition rate (120 Hz), or over the entire field at a lower rate (10 Hz). Its built-in programmable amplifier will be used as an electronic intensity control.

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Section: Traditional Designmentioning

confidence: 99%

A Design Report for the Optical Transition Radiation Imager for the LCLS Undulator

Yang¹

2010

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“…With the appropriate choice of scintillator material, the screen can also be used for x-ray beam imaging. In this section, we will explore various aspects of design and modeling by working at an actual system [6].…”

Section: Screen Imaging System Designmentioning

confidence: 99%

“…The most accurate characterization technique is the use of a back-lit, scanning pinhole moved by computer controlled linear stages [6]. Scanning the pinhole in the longitudinal direction can locate the focal point and determine defocusing properties.…”

Section: Calibrationmentioning

confidence: 99%

Optical System Design for High-Energy Particle Beam Diagnostics

Yang¹

2002

AIP Conference Proceedings

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Abstract. Radiation generated by high-energy particle beams is widely used to characterize the beam properties. While the wavelengths of radiation may vary from visible to x-rays, the physics underlying the engineering designs are similar. In this tutorial, we discuss the basic considerations for the optical system design in the context of beam instrumentation and the constraints applied by high-radiation environments. We cover commonly used optical diagnostics: fluorescence flags, visible and x-ray synchrotron radiation imaging. Emphases will be on achieving desired resolution, accuracy, and reproducibility.

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“…4. Flexible chambers [4] inside the dipoles are to bend with the same radii as the electron trajectory to ensure aperture continuity. Two pairs of rotating platforms (15) between B1-B2 and B3-B4 ensure that quadrupoles Q1 and Q2 move as specified in the design requirements.…”

Section: Design Requirementsmentioning

confidence: 99%

Mechanical design of a flexible bunch compressor for APS linac

Rotela

Sharma²,

Barcikowski³

et al.

PACS2001. Proceedings of the 2001 Particle Accelerator Conference (Cat. No.01CH37268)

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A bunch compressor has been installed in the APS linac to produce high peak currents for the FEL project and to explore the effects of coherent synchrotron radiation (CSR). The bunch compressor design is based on an asymmetric four-dipole chicane configuration in which asymmetry and variable R 56 can be optimized to control CSR-induced emittance growth. This flexibility is achieved by allowing the middle two dipoles to move transversely to the beam and the last dipole to move longitudinally. In this paper we describe the design of the stages used for precise movement of the bunch compressor magnets and associated diagnostics components.

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Design and performance of a compact imaging system for the APS linac bunch compressor

Cited by 7 publications

References 3 publications

A Design Report for the Optical Transition Radiation Imager for the LCLS Undulator

A Design Report for the Optical Transition Radiation Imager for the LCLS Undulator

Optical System Design for High-Energy Particle Beam Diagnostics

Mechanical design of a flexible bunch compressor for APS linac

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