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Title: Measurement of bunch length in Indus-1 storage ring using fast photodiode

Abstract

The length of electron bunches in a storage ring is an important parameter for both synchrotron radiation users and accelerator physicists. Several methods are used for measurements of bunch length using electronic and optical instruments. We have measured temporal profile of synchrotron radiation emitted from dipole magnet of Indus-1 by using fast photodiode. Bunch length is calculated by assuming gaussian profile for the particles inside bunch. The results show that bunch length is increasing with the decrease of gap voltage of RF cavity. These measurements were carried out at low beam current; at high voltage results are in close agreement with theory and the values estimated using ZAP code. In the second experiment, the results show that bunch length increases with the increase of beam current inside the bunch, and above threshold current, it follows Chao-Gareyte scaling law. The longitudinal broadband impedance for Indus-1 SRS was estimated using Keil-Schnell criterion and results were compared with theoretical estimated values using ZAP code.

Authors:
; ; ; ; ; ; ;  [1]
  1. Beam Diagnostics Section, Raja Ramanna Centre for Advanced Technology, Indore 452013 (India)
Publication Date:
OSTI Identifier:
22093977
Resource Type:
Journal Article
Journal Name:
Review of Scientific Instruments
Additional Journal Information:
Journal Volume: 83; Journal Issue: 11; Other Information: (c) 2012 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0034-6748
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; ACCELERATORS; BEAM BUNCHING; BEAM CURRENTS; DIPOLES; INDUS-1; MAGNETS; PARTICLE BEAMS; PHOTODIODES; RF SYSTEMS; SCALING LAWS; SYNCHROTRON RADIATION; THRESHOLD CURRENT

Citation Formats

Garg, Akash Deep, Nathwani, R. K., Holikatti, A. C., Kumar Karnewar, Akhilesh, Tyagi, Y., Yadav, S., Puntambekar, T. A., and Navathe, C. P. Measurement of bunch length in Indus-1 storage ring using fast photodiode. United States: N. p., 2012. Web. doi:10.1063/1.4767461.
Garg, Akash Deep, Nathwani, R. K., Holikatti, A. C., Kumar Karnewar, Akhilesh, Tyagi, Y., Yadav, S., Puntambekar, T. A., & Navathe, C. P. Measurement of bunch length in Indus-1 storage ring using fast photodiode. United States. doi:10.1063/1.4767461.
Garg, Akash Deep, Nathwani, R. K., Holikatti, A. C., Kumar Karnewar, Akhilesh, Tyagi, Y., Yadav, S., Puntambekar, T. A., and Navathe, C. P. Thu . "Measurement of bunch length in Indus-1 storage ring using fast photodiode". United States. doi:10.1063/1.4767461.
@article{osti_22093977,
title = {Measurement of bunch length in Indus-1 storage ring using fast photodiode},
author = {Garg, Akash Deep and Nathwani, R. K. and Holikatti, A. C. and Kumar Karnewar, Akhilesh and Tyagi, Y. and Yadav, S. and Puntambekar, T. A. and Navathe, C. P.},
abstractNote = {The length of electron bunches in a storage ring is an important parameter for both synchrotron radiation users and accelerator physicists. Several methods are used for measurements of bunch length using electronic and optical instruments. We have measured temporal profile of synchrotron radiation emitted from dipole magnet of Indus-1 by using fast photodiode. Bunch length is calculated by assuming gaussian profile for the particles inside bunch. The results show that bunch length is increasing with the decrease of gap voltage of RF cavity. These measurements were carried out at low beam current; at high voltage results are in close agreement with theory and the values estimated using ZAP code. In the second experiment, the results show that bunch length increases with the increase of beam current inside the bunch, and above threshold current, it follows Chao-Gareyte scaling law. The longitudinal broadband impedance for Indus-1 SRS was estimated using Keil-Schnell criterion and results were compared with theoretical estimated values using ZAP code.},
doi = {10.1063/1.4767461},
journal = {Review of Scientific Instruments},
issn = {0034-6748},
number = 11,
volume = 83,
place = {United States},
year = {2012},
month = {11}
}