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.affiliation: Beam Diagnostics Section, Raja Ramanna Centre for Advanced Technology, Indore 452013, India. akash-deep@rrcat.gov.in
authors.forename: Akash Deep
authors.initials: AD
authors.lastname: Garg
authors.forename: R K
authors.initials: RK
authors.lastname: Nathwani
authors.forename: A C
authors.initials: AC
authors.lastname: Holikatti
authors.forename: Akhilesh Kumar
authors.initials: AK
authors.lastname: Karnewar
authors.forename: Y
authors.initials: Y
authors.lastname: Tyagi
authors.forename: S
authors.initials: S
authors.lastname: Yadav
authors.forename: T A
authors.initials: TA
authors.lastname: Puntambekar
authors.forename: C P
authors.initials: CP
authors.lastname: Navathe