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Title: Conceptual design of front ends for the advanced photon source multi-bend achromats upgrade

Abstract

The proposed Advanced Photon Source (APS) upgrade from a double-bend achromats (DBA) to multi-bend achromats (MBA) lattice with ring energy change from 7 GeV to 6 GeV and beam current from 100 mA to 200 mA poses new challenges for front ends. All front ends must be upgraded to fulfill the following requirements: 1) handle the high heat load from two insertion devices in either inline or canted configuration, 2) include a clearing magnet in the front end to deflect and dump any electrons in case the electrons escape from the storage ring during swap-out injection with the safety shutters open, 3) incorporate the next generation x-ray beam position monitors (XBPMs) into the front end to meet the new stringent beam stability requirements. This paper presents the evaluation of the existing APS front ends and standardizes the insertion device (ID) front ends into two types: one for the single beam and one for the canted beams. The conceptual design of high heat load front end (HHLFE) and canted undulator front end (CUFE) for APS MBA upgrade is presented.

Authors:
; ; ; ; ;  [1]
  1. Advanced Photon Source, Argonne National Laboratory, 9700 S. Cass Ave, Bldg. 401, Argonne, IL 60439, U.S.A (United States)
Publication Date:
OSTI Identifier:
22608330
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1741; Journal Issue: 1; Conference: SRI2015: 12. international conference on synchrotron radiation instrumentation, New York, NY (United States), 6-10 Jul 2015; Other Information: (c) 2016 Author(s); Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; ADVANCED PHOTON SOURCE; BEAM CURRENTS; BEAM POSITION; ELECTRON BEAMS; GEV RANGE 01-10; INJECTION; PHOTONS; STABILITY; WIGGLER MAGNETS; X RADIATION

Citation Formats

Jaski, Y., E-mail: jaskiy@aps.anl.gov, Westferro, F., E-mail: westferr@aps.anl.gov, Lee, S. H., E-mail: shlee@aps.anl.gov, Yang, B., E-mail: bxyang@aps.anl.gov, Abliz, M., E-mail: mabliz@aps.anl.gov, and Ramanathan, M., E-mail: mohan@aps.anl.gov. Conceptual design of front ends for the advanced photon source multi-bend achromats upgrade. United States: N. p., 2016. Web. doi:10.1063/1.4952816.
Jaski, Y., E-mail: jaskiy@aps.anl.gov, Westferro, F., E-mail: westferr@aps.anl.gov, Lee, S. H., E-mail: shlee@aps.anl.gov, Yang, B., E-mail: bxyang@aps.anl.gov, Abliz, M., E-mail: mabliz@aps.anl.gov, & Ramanathan, M., E-mail: mohan@aps.anl.gov. Conceptual design of front ends for the advanced photon source multi-bend achromats upgrade. United States. doi:10.1063/1.4952816.
Jaski, Y., E-mail: jaskiy@aps.anl.gov, Westferro, F., E-mail: westferr@aps.anl.gov, Lee, S. H., E-mail: shlee@aps.anl.gov, Yang, B., E-mail: bxyang@aps.anl.gov, Abliz, M., E-mail: mabliz@aps.anl.gov, and Ramanathan, M., E-mail: mohan@aps.anl.gov. 2016. "Conceptual design of front ends for the advanced photon source multi-bend achromats upgrade". United States. doi:10.1063/1.4952816.
@article{osti_22608330,
title = {Conceptual design of front ends for the advanced photon source multi-bend achromats upgrade},
author = {Jaski, Y., E-mail: jaskiy@aps.anl.gov and Westferro, F., E-mail: westferr@aps.anl.gov and Lee, S. H., E-mail: shlee@aps.anl.gov and Yang, B., E-mail: bxyang@aps.anl.gov and Abliz, M., E-mail: mabliz@aps.anl.gov and Ramanathan, M., E-mail: mohan@aps.anl.gov},
abstractNote = {The proposed Advanced Photon Source (APS) upgrade from a double-bend achromats (DBA) to multi-bend achromats (MBA) lattice with ring energy change from 7 GeV to 6 GeV and beam current from 100 mA to 200 mA poses new challenges for front ends. All front ends must be upgraded to fulfill the following requirements: 1) handle the high heat load from two insertion devices in either inline or canted configuration, 2) include a clearing magnet in the front end to deflect and dump any electrons in case the electrons escape from the storage ring during swap-out injection with the safety shutters open, 3) incorporate the next generation x-ray beam position monitors (XBPMs) into the front end to meet the new stringent beam stability requirements. This paper presents the evaluation of the existing APS front ends and standardizes the insertion device (ID) front ends into two types: one for the single beam and one for the canted beams. The conceptual design of high heat load front end (HHLFE) and canted undulator front end (CUFE) for APS MBA upgrade is presented.},
doi = {10.1063/1.4952816},
journal = {AIP Conference Proceedings},
number = 1,
volume = 1741,
place = {United States},
year = 2016,
month = 7
}
  • The proposed Advanced Photon Source (APS) upgrade from a double-bend achromats (DBA) to multi-bend achromats (MBA) lattice with ring energy change from 7 GeV to 6 GeV and beam current from 100 mA to 200 mA poses new challenges for front ends. All front ends must be upgraded to fulfill the following requirements: 1) handle the high heat load from two insertion devices in either inline or canted configuration, 2) include a clearing magnet in the front end to deflect and dump any electrons in case the electrons escape from the storage ring during swap-out injection with the safety shuttersmore » open, 3) incorporate the next generation x-ray beam position monitors (XBPMs) into the front end to meet the new stringent beam stability requirements. This paper presents the evaluation of the existing APS front ends and standardizes the insertion device (ID) front ends into two types: one for the single beam and one for the canted beams. The conceptual design of high heat load front end (HHLFE) and canted undulator front end (CUFE) for APS MBA upgrade is presented.« less
  • A compact filter/mask/window assembly has been designed for undulator beamline commissioning activity at the Advanced Photon Source beamlines. The assembly consists of one 300-{mu}m graphite filter, one 127-{mu}m CVD diamond filter and two 250-{mu}m beryllium windows. A water-cooled Glidcop fixed mask with a 4.5 mm{times}4.5 mm output optical aperture and a 0.96 mrad{times}1.6 mrad beam missteering acceptance is a major part in the assembly. The CVD diamond filter, which is mounted on the downstream side of the fixed mask, is designed to also function as a transmitting x-ray beam position monitor. The sum signal from the latter can be usedmore » to monitor the physical condition of the graphite filter and prevent any possible chain reaction damage to the beryllium windows downstream. In this paper, the design concept as well as the detailed structural design of the commissioning window are presented. Further applications of the commissioning window components are also discussed. {copyright} {ital 1996 American Institute of Physics.}« less
  • A 67-pm hybrid-seven-bend achromat (H7BA) lattice is proposed for a futureAdvanced Photon Source (APS)multibend- achromat (MBA) upgrade. This lattice requires use of a swap-out (on-axis) injection scheme. Alternate lattice design work has also been performed to achieve better beam dynamics performance than the nominal APS MBA lattice, in order to allow beam accumulation. One of such alternate H7BA lattice designs, which still targets a very low emittance of 76 pm, is discussed in this paper. With these lattices, existing APS injector complex can be employed without the requirement of a very high charge operation. Studies show that an emittance belowmore » 76 pm can be achieved with the employment of reverse bends in an alternate lattice. We discuss the predicted performance and requirements for these lattices and compare them to the nominal lattice.« less
  • This paper will describe and analyze the rf beam position monitor (RFBPM) front-end upgrade for the Advanced Photon Source (APS) storage ring. This system is based on amplitude-to-phase (AM/PM) conversion monopulse receivers. The design and performance of the existing BPM front-end will be considered as the base-line design for the continuous effort to improve and upgrade the APS beam diagnostics. The upgrade involves redesigning the in-tunnel filter comparator units to improve insertion loss, return loss, and band-pass filter-matching that presently limit the different fill patterns used at APS. {copyright} {ital 1998 American Institute of Physics.}
  • This paper will describe and analyze the rf beam position monitor (RFBPM) front-end upgrade for the Advanced Photon Source (APS) storage ring. This system is based on amplitude-to-phase (AM/PM) conversion monopulse receivers. The design and performance of the existing BPM front-end will be considered as the base-line design for the continuous effort to improve and upgrade the APS beam diagnostics. The upgrade involves redesigning the in-tunnel filter comparator units to improve insertion loss, return loss, and band-pass filter-matching that presently limit the different fill patterns used at APS.