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Beam wire scanners are installed in the injector linac and beam transport lines at KEK electron/positron accelerator complex. A group of four wire scanners are utilized to measure the transverse beam profiles and the Twiss parameters. For now Five groups are installed along the beam lines.
VME IOC controls and monitors stepper motors, high-voltage power supplies, photo-multipliers, etc. through CAMAC and GPIB interfaces.
Several wire scanners will be additionally installed for SuperKEKB. At the same time the control architecture would be rejuvenated with event-based synchronized measurements and controls.
A rejuvenation plan was proposed by K.F, and it was implemented by Anindya Roy from VECC, India with help from N.Iida, T.Nakamura, A.Akiyama, T.Okazaki.
Please send your comments and questions to K.Furukawa.
The KEK 8-GeV LINAC injects electron and positron beams with different characteristics into four storage rings: KEKB high-energy ring (HER), KEKB low-energy ring (LER), Photon Factory (PF) and PF- AR. The wire scanners are used to monitor beam profile non-destructively along the beam line. A data acquisition system, synchronized with LINAC timing system, is developed to acquire multiple beam mode data simultaneously. The data acquisition time and quality are optimized in this system by implementing a multispeed wire movement. The system is installed in LINAC beam line and tested successfully. This presentation will describe the system.
Japanese and English announcements and abstracts.
Presentation file [pdf]
19 people attended at the meeting room, 5F, 3gokan, on Jun.14.2012. [Linac Seminars]
Upgrade of Wire Scanner Controls [pdf], T. Okazaki, KEKB Controls Meeting, Sep. 2012.
Development of Fast Controls for Beam Wire Scanner for SuperKEKB [pdf]
Proc of PCaPAC2012, Kolkata, India, December 2012. A. Roy, T. Okazaki, K. Furukawa, N. Iida, pp.57-59.
Summary report: Development of fast controls for beam wire scanner [pdf]
Anindya Roy, July 2012.
Application of Optical Fiber to The Sensor for Wire Scanner (Japanese) [pdf]
Proc of PASJ2012, Toyonaka, Japan, August 2012. Y. Yano, N. Iida, S. Michizono
Recent Progress of Wire Scanner Systems
for the KEKB Injector Linac and Beam Transport Lines [pdf]
Proc of EPAC2000, Vienna, Austria, June 2000. N. Iida, Y. Funakoshi, T. Kawamoto, M. Kikuchi, T. Mimashi, T. Suwada, M. Tanaka, M. Yamauchi and S. Yoshida, pp.1738-1740.
The First Results of Optics Matching Using Wire Scanners
for the KEKB Beam Transport Line [pdf]
Proc of PAC99, New York City, USA., March 1999. N. Iida, Y. Funakoshi, M. Kikuchi, K. Satoh, T. Suwada, pp.2108-2110.
Beam Tests of a Wire Scanner for the KEKB Injector Linac and
Beam Transport Line [pdf]
Proc of APAC'98, Tsukuba, Japan, March 1998. Y. Funakoshi, N. Iida, T. Suwada, T. Kawamoto, M. Kikuchi, pp.537-539.
A Method for Measuring Vibrations in Wire Scanner Beam Profile Monitors
Proc of APAC'98, Tsukuba, Japan, March 1998. N. Iida, T. Suwada, Y. Funakoshi, T. Kawamoto, M. Kikuchi, pp.546-548.
The KEKB Injector Linac [pdf], section 8.5 and 10.1
Nucl. Instrum. Meth. A 499, 2003, pp.167-190.
Beam-Transport System of KEKB [pdf], section 2.5.2
Nucl. Instrum. Meth. A 499, 2003, pp.8-23.
12bit Isolated DAC (Internix pvme323) [Japanese PDF]
Stepping motor controller [Japanese]
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