LLRF05

Session

Talks Session 2

not assigned

11 Oct 2005, 08:30

CERN

Conveners

Talks Session 2

• Curt Hovater (JLAB)

Talks Session 2

• Curt Hovater (JLAB)

Description

The Scientific Secretary of this session is Dr. Elena Shaposhnikova

1. The LHC Low Level RF

Dr Philippe Baudrenghien (CERN)

11/10/2005, 08:30

invited

The LHC RF includes eight 400 MHz super conducting cavities per ring. Each cavity is independently powered by a 300 kW klystron via a circulator. The challenges are: very high beam current (more than 1A RF component) and very low RF noise (emittance growth time in excess of 25 hours). To achieve that, the Low-Level RF comprises the following sub-systems: • We have one Cavity...

55. CERN LEIR LLRF

Maria Elena Angoletta

11/10/2005, 08:50

invited

From 2008 onwards the LHC physics programme will include, in addition to proton- proton collisions, running periods with heavy-ion collisions. The injector complex has to be adapted in order to satisfy LHC ion requirements. In particular, a Low Energy Ion Ring (LEIR) has been built at CERN and will be commissioned by early/mid 2006. LEIR will be equipped with a new digital beam control...

64. CERN LINAC LLRF

Tony Rohlev (CERN)

11/10/2005, 09:10

invited

A VME based control system has been developed and built at CERN for the servo loops regulating the field in linac accelerating structures. It is an all-digital system built on a single VME card, providing digital detection, processing, and modulation. It is foreseen to be used, in different versions, for the needs of both present and future CERN hadron linacs and is currently being...

67. Femtosecond Stable Timing and Synchronisation Systems

Dr Volker Schlott (PSI)

11/10/2005, 09:30

invited

17. Phase noise measurements in TRIUMF ISAC 2 cryomodule

Dr Kenneth Fong (TRIUMF)

11/10/2005, 11:20

invited

The phase noise spectra of the superconducting cavities of the ISAC 2 cryomodule and of the test cryostat were measured under various conditions. Analysis of the results show that the major contributors to this phase noise are microphonics, including those from the superconducting cavities, the cryomodule and the power amplifiers, each of which can be identified with their unique...

3. Noise Effects on Stored Beams in a Proton Synchrotron

Dr Sergey Ivanov (Institute for High Energy Physics (IHEP))

11/10/2005, 11:40

invited

The presentation will start with a few general remarks on a theory of beam motion under noises (inside and beyond RF buckets, non-linearity, stationary and periodically non-stationary noises, drift fluxes, etc). Existing difficulties would be outlined and ways to solve them sketched out. Availability of ready-to-use proven techniques and tools will be commented. Experimental...

23. Bunch Lengthening in Tevatron due to RF noise

Mr Valeri Lebedev (FNAL)

11/10/2005, 12:00

invited

If not suppressed the RF system noise can significantly affect the luminosity of hadron collider. It causes the bunch lengthening with consecutive decrease of the beam intensity. Presently, the RF noise is the second leading reason of bunch lengthening in Tevatron yielding to the intrabeam scattering at the store beginning. The noise is mainly created by microphonics in RF cavities and...

7. The LCLS LLRF Control System

Dayle Kotturi (Stanford Linear Accelerator Center)

11/10/2005, 12:20

invited

The LINAC Coherent Light Source requires an RF stability of 0.1% rms in amplitude, 100 fs in phase for a 850 ns fill time for the S-band structure, 125 fs in phase for a 100 ns fill time for the X-band structure and 30 ns rise times for the RF gun pulse shaper. This paper describes the design of a new VME/EPICS-based control system for the LCLS low level RF system that will monitor and...