ICFA Mini Workshop on Higher Order Modes in Superconducting Cavities (HOMSC2018)

Session

High-Current Accelerators and HOM Damping Requirements

Oct 1, 2018, 9:45 AM

401 (Physical Science building (PSB))

Conveners

High-Current Accelerators and HOM Damping Requirements

• Erk Jensen (CERN)

High-Current Accelerators and HOM Damping Requirements

• Erk Jensen (CERN)

17. HOM damping requirements for high-current option of FCCee

Dr Ivan Karpov (CERN)

10/1/18, 9:45 AM

Oral presentation

The beam induced power losses and longitudinal coupled-bunch instabilities due to high order modes (HOM) in superconducting radio frequency (RF) cavities can impose significant limitations for the high-current synchrotrons. They strongly depend on the both cavity geometry and filling schemes used in the operation. For the beam stability, the considered HOMs should be damped below a certain...

13. BESSY VSR project overview

Dr ADOLFO VELEZ (HZB G-ISRF)

10/1/18, 11:00 AM

Oral presentation

HZB is pursuing a superconducting upgrade of the BESSY II synchrotron ring in order to allow the machine to simultaneously store both long (15ps) and short (1.7ps) bunches. To achieve this goal higher harmonic cavities (1.5GHz and 1.75GHz) to the 500MHz normal conducting cavities operated in BESSY must be installed. In standard BESSY VSR operation a 300mA beam will be combined with a 20MV/m....

15. Overview of CBETA and the role of HOMs

Prof. Georg Hoffstaetter (Cornell University)

10/1/18, 11:30 AM

Oral presentation

CBETA, the Cornell-BNL ERL Test Accelerator that is currently being constructed at Cornell University combines several forefront accelerator components to a prototyping facility for the Electron-Ion Collider, the US’ next large particle accelerator project. CBETA uses a high-brightness photo-emitter electron source and a high power SRF linac to inject a CW electron beam into a 4-turn ERL. The...