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Title: NSLS-II commissioning and operation

Abstract

The National Synchrotron Light Source II at Brookhaven National Lab is a third-generation synchrotron radiation facility that has been commissioned in 2014. The facility is based on a 3 GeV electron storage ring, which will circulate 500 mA of beam current at 1 nm rad horizontal emittance. The storage ring is 792 meters in circumference and will accommodate more than 60 beamlines in the final built-out. The beamline sources range from insertion-devices located in straight sections, bending magnets or three-pole-wigglers configured in multiple branches. The NSLS-II storage ring commissioning was successfully completed in July 2014 and the facility delivered the first user light on October 23, 2014. Currently the storage ring reached 300 mA beam current and achieved 1 nm rad of horizontal emittance with 3 sets of Damping Wigglers. At this point six NSLS-II project beamlines are routinely taking photons with beam current at 150 mA. This paper reviews the NSLS-II accelerator design and commissioning experience.

Authors:
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  1. Brookhaven National Laboratory, Upton, NY 11973 (United States)
Publication Date:
OSTI Identifier:
22608303
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; BEAM CURRENTS; BEAMS; COMMISSIONING; DAMPING; DESIGN; ELECTRONS; GEV RANGE 01-10; MAGNETS; NSLS; OPERATION; PHOTONS; STORAGE RINGS; SYNCHROTRON RADIATION

Citation Formats

Wang, G., E-mail: gwang@bnl.gov, Shaftan, T., Bassi, G., Bengtsson, J., Blednykh, A., Blum, E., Cheng, W., Choi, J., Davidsaver, M., Doom, L., Fliller, R., Ganetis, G., Guo, W., Hidaka, Y., Kramer, S., Li, Y., Podobedov, B., Qian, K., Rose, J., Seletskiy, S., and and others. NSLS-II commissioning and operation. United States: N. p., 2016. Web. doi:10.1063/1.4952786.
Wang, G., E-mail: gwang@bnl.gov, Shaftan, T., Bassi, G., Bengtsson, J., Blednykh, A., Blum, E., Cheng, W., Choi, J., Davidsaver, M., Doom, L., Fliller, R., Ganetis, G., Guo, W., Hidaka, Y., Kramer, S., Li, Y., Podobedov, B., Qian, K., Rose, J., Seletskiy, S., & and others. NSLS-II commissioning and operation. United States. doi:10.1063/1.4952786.
Wang, G., E-mail: gwang@bnl.gov, Shaftan, T., Bassi, G., Bengtsson, J., Blednykh, A., Blum, E., Cheng, W., Choi, J., Davidsaver, M., Doom, L., Fliller, R., Ganetis, G., Guo, W., Hidaka, Y., Kramer, S., Li, Y., Podobedov, B., Qian, K., Rose, J., Seletskiy, S., and and others. 2016. "NSLS-II commissioning and operation". United States. doi:10.1063/1.4952786.
@article{osti_22608303,
title = {NSLS-II commissioning and operation},
author = {Wang, G., E-mail: gwang@bnl.gov and Shaftan, T. and Bassi, G. and Bengtsson, J. and Blednykh, A. and Blum, E. and Cheng, W. and Choi, J. and Davidsaver, M. and Doom, L. and Fliller, R. and Ganetis, G. and Guo, W. and Hidaka, Y. and Kramer, S. and Li, Y. and Podobedov, B. and Qian, K. and Rose, J. and Seletskiy, S. and and others},
abstractNote = {The National Synchrotron Light Source II at Brookhaven National Lab is a third-generation synchrotron radiation facility that has been commissioned in 2014. The facility is based on a 3 GeV electron storage ring, which will circulate 500 mA of beam current at 1 nm rad horizontal emittance. The storage ring is 792 meters in circumference and will accommodate more than 60 beamlines in the final built-out. The beamline sources range from insertion-devices located in straight sections, bending magnets or three-pole-wigglers configured in multiple branches. The NSLS-II storage ring commissioning was successfully completed in July 2014 and the facility delivered the first user light on October 23, 2014. Currently the storage ring reached 300 mA beam current and achieved 1 nm rad of horizontal emittance with 3 sets of Damping Wigglers. At this point six NSLS-II project beamlines are routinely taking photons with beam current at 150 mA. This paper reviews the NSLS-II accelerator design and commissioning experience.},
doi = {10.1063/1.4952786},
journal = {AIP Conference Proceedings},
number = 1,
volume = 1741,
place = {United States},
year = 2016,
month = 7
}
  • The National Synchrotron Light Source II (NSLS-II) is a state of the art 3 GeV third generation light source at Brookhaven National Laboratory. During spring/ summer of 2014, the storage ring was commissioned up to 50 mA without insertion devices. In the fall of 2014, we began commissioning of the project beamlines, which included seven insertion devices on six ID ports. Beamlines IXS, HXN, CSX-1, CSX-2, CHX, SRX, and XPD-1 consist of elliptically polarized undulator (EPU), damping wigglers (DW) and in-vacuum undulators (IVU) covering from VUV to hard x-ray range. In this paper, experience with commissioning and operation is discussed.more » We focus on reaching storage ring performance with IDs, including injection, design emittance, compensation of orbit distortions caused by ID residual field, source point stability, beam alignment and tools for control, monitoring and protection of the ring chambers from ID radiation.« less
  • The NSLS-II Synchrotron Light Source is a 3 GeV electron storage ring recently commissioned and is now entering operations at Brookhaven National Laboratory. One of the major tasks was to commission the six project beamline front ends which required a diagnostic to resolve x-ray beam position for the purpose of beam alignment at low current. Since none of the front ends were outfitted with any x-ray diagnostics in the baseline design, an x-ray beam profile monitor or “flag” that could be easily installed into existing front end vacuum chambers was proposed to satisfy this requirement. Here we present the developmentmore » of this novel device which utilizes a polycrystalline CVD diamond luminescent screen to produce a visible image of the x-ray beam cross-section and is then captured with a CCD camera.« less
  • The first eight insertion devices (IDs) at the NSLS-II were commissioned during the fall run of 2014. In this paper we discuss commissioning of the synchrotron radiation protection (SRP) system and beamline frontends (FE) for the respective IDs. We describe the diagnostics utilized if FE commissioning and a procedure that was used for the alignment of the photon beam from insertion devices in the beamline frontends. Then we discuss the current status of the SRP system and operation of the commissioned frontends.
  • The injector for the National Synchrotron Light Source II (NSLS-II) storage ring consists of a 3 GeV booster synchrotron and a 200 MeV S-band linac. The linac was designed to produce either a single bunch with a charge of 0.5 nC of electrons or a train of bunches up to 300 ns long containing a total charge of 15 nC. The booster was designed to accelerate up to 15 nC each cycle in a train of bunches up to 300 ns long. Linac commissioning was completed in April 2012. Booster commissioning was started in November 2013 and completed in Marchmore » 2014. All of the significant design goals were satisfied including beam emittance, energy spread, and transport efficiency. While the maximum booster charge accelerated was only 10 nC, this has proven to be more than sufficient for storage ring commissioning and operation. The injector has operated reliably during storage ring operation since then. Results will be presented showing measurements of linac and booster operating parameters achieved during commissioning and initial operation. Operating experience and reliability during the first year of NSLS-II operation will be discussed.« less
  • The National Synchrotron Light Source II (NSLS-II) is a 3 GeV electron X-ray user facility commissioned in 2014. The storage ring RF system, essential for replenishing energy loss per turn of the electrons, consists of digital low level RF controllers, 310 kW CW klystron transmitters, CESR-B type superconducting cavities, as well as a supporting cryogenic system. Here we will report on RF commissioning and early operation experience of the system for beam current up to 200mA.