DIPAC2011 - List of Keywords (bunching)

Paper	Title	Other Keywords	Page
TUPD16	High Frequency Measurements of the Beam Position Monitors for the TBL Line of the CTF3 at CERN	impedance, pick-up, monitoring, simulation	335
	J.J. García-Garrigós, C. Blanch Gutierrez, J.V. Civera-Navarrete, A. Faus-Golfe IFIC, Valencia, Spain B. Gimeno UVEG, Burjasot (Valencia), Spain
	Funding: Funding Agency: FPA2010-21456-C02-00 A series of Inductive Pick-Ups (IPU) for Beam Position Monitoring (BPM) with its associated electronics were designed, constructed and tested at IFIC. A full set of 16 BPMs, so called BPS units, were successfully installed in the Test Beam Line (TBL) of the 3rd CLIC Test Facility (CTF3) at CERN. Two different characterization tests, at low and high frequencies, were carried out on the BPS units: The low frequency test, in the beam pulse time scale (until 10ns/100MHz), determined the BPSs parameters directly related to the beam position monitoring and the high frequency test, reaching the microwave X-Ku bands around the beam bunching time scale (83ps/12GHz). In this paper we describe the results and methods used to obtain the longitudinal impedance in the frequency range of interest. This test is based on the S-parameters measurements of the propagating TEM mode in a matched coaxial waveguide, specifically designed for the BPS, which is able to emulate an ultra-relativistic electron beam.
	Poster TUPD16 [1.069 MB]

TUPD82	First Results of the LHC Collision Rate Monitors	luminosity, simulation, interaction-region, proton	497
	E. Bravin, S. Bart Pedersen, A. Boccardi, S. Burger, C. Dutriat CERN, Geneva, Switzerland L.R. Doolittle, H.S. Matis, M. Placidi, A. Ratti, H. Yaver, T. stezelberger LBNL, Berkeley, California, USA R. Miyamoto BNL, Upton, Long Island, New York, USA
	Funding: This work is partially supported by the US DoE through US-LARP The aim of CERN’s large hadron collider (LHC) is to collide protons and heavy ions with centre of mass energies up to 14 zTeV. In order to monitor and optimize the collision rates special detectors have been developed and installed around the four luminous interaction regions. Due to the different conditions at the high luminosity experiments, ATLAS and CMS, and the low luminosity experiments, ALICE and LHC-b, two very different types of monitors are used, a fast ionisation chamber (BRAN-A) and a Cd-Te solid state detector (BRAN-B) respectively. Moreover in order to cope with the low collision rates foreseen for the initial run a third type of monitor, based on a simple scintillating pad, was installed in parallel with the BRAN-A. This contribution illustrates the results obtained during the 2010 run with an outlook for 2011 and beyond.

Paper

Title

Other Keywords

Page

TUPD16

High Frequency Measurements of the Beam Position Monitors for the TBL Line of the CTF3 at CERN

impedance, pick-up, monitoring, simulation

335

J.J. García-Garrigós, C. Blanch Gutierrez, J.V. Civera-Navarrete, A. Faus-Golfe
IFIC, Valencia, Spain
B. Gimeno
UVEG, Burjasot (Valencia), Spain

Funding: Funding Agency: FPA2010-21456-C02-00
A series of Inductive Pick-Ups (IPU) for Beam Position Monitoring (BPM) with its associated electronics were designed, constructed and tested at IFIC. A full set of 16 BPMs, so called BPS units, were successfully installed in the Test Beam Line (TBL) of the 3rd CLIC Test Facility (CTF3) at CERN. Two different characterization tests, at low and high frequencies, were carried out on the BPS units: The low frequency test, in the beam pulse time scale (until 10ns/100MHz), determined the BPSs parameters directly related to the beam position monitoring and the high frequency test, reaching the microwave X-Ku bands around the beam bunching time scale (83ps/12GHz). In this paper we describe the results and methods used to obtain the longitudinal impedance in the frequency range of interest. This test is based on the S-parameters measurements of the propagating TEM mode in a matched coaxial waveguide, specifically designed for the BPS, which is able to emulate an ultra-relativistic electron beam.

Poster TUPD16 [1.069 MB]

TUPD82

First Results of the LHC Collision Rate Monitors

luminosity, simulation, interaction-region, proton

497

E. Bravin, S. Bart Pedersen, A. Boccardi, S. Burger, C. Dutriat
CERN, Geneva, Switzerland
L.R. Doolittle, H.S. Matis, M. Placidi, A. Ratti, H. Yaver, T. stezelberger
LBNL, Berkeley, California, USA
R. Miyamoto
BNL, Upton, Long Island, New York, USA

Funding: This work is partially supported by the US DoE through US-LARP
The aim of CERN’s large hadron collider (LHC) is to collide protons and heavy ions with centre of mass energies up to 14 zTeV. In order to monitor and optimize the collision rates special detectors have been developed and installed around the four luminous interaction regions. Due to the different conditions at the high luminosity experiments, ATLAS and CMS, and the low luminosity experiments, ALICE and LHC-b, two very different types of monitors are used, a fast ionisation chamber (BRAN-A) and a Cd-Te solid state detector (BRAN-B) respectively. Moreover in order to cope with the low collision rates foreseen for the initial run a third type of monitor, based on a simple scintillating pad, was installed in parallel with the BRAN-A. This contribution illustrates the results obtained during the 2010 run with an outlook for 2011 and beyond.