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Full Record Details
Persistent URL
http://purl.org/net/epubs/work/22644819
Record Status
Checked
Record Id
22644819
Title
Laserwire Emittance Scanner at CERN Linac 4
Contributors
KO Kruchinin (Royal Holloway, UK)
,
GE Boorman (Royal Holloway, UK)
,
A Bosco (Royal Holloway, UK)
,
SM Gibson (Royal Holloway, UK)
,
P Karataev (Royal Holloway, UK)
,
E Bravin (CERN, Geneva)
,
T Hofmann (CERN, Geneva)
,
U Raich (CERN, Geneva)
,
F Roncarolo (CERN, Geneva)
,
F Zocca (CERN, Geneva)
,
A Letchford (STFC Rutherford Appleton Lab.)
,
JK Pozimski (Imperial College)
Abstract
Linac 4 presently under construction at CERN is designed to replace the existing 50 MeV Linac 2 in the LHC injector chain and will accelerate the beam of high current negative hydrogen ions to 160 MeV. During the commissioning a laserwire emittance scanner has been installed allowing noninvasive measuring of the emittance at 3 MeV and 12 MeV setups. A low power infrared fibre coupled laser was focused in the interaction region down to ~150 um and collided with the ion beam neutralising negative ions. At each transverse laser position with respect to the ion beam the angular distribution of the neutral particle beamlets was recorded by scanning a diamond detector across the beamlet at a certain distance from the IP while the main beam of the H? ions was deflected using dipole magnet installed upstream the detector. Measuring the profile of the beamlet by scanning the laser across the beam allows to directly measure the transverse phase-space distribution and reconstruct the transverse beam emittance. In this report we will describe the analysis of the data collected during the 3 MeV and 12 MeV operation of the Linac 4. We will discuss the hardware status and future plans.
Organisation
ISIS
,
STFC
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Language
English (EN)
Type
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Paper In Conference Proceedings
In 6th International Particle Accelerator Conference (IPAC'15), Richmond, Virginia, USA, 3-8 May 2015, (2015): 1146-1149.
mopwi003.pdf
2015
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