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 relatively low power infrared fibre coupled laser w a s focused in the interaction region down to ∼150 μm and collided with the ion beam neutralising negative ions. A t each transverse laser position with respect to the ion beam the angular distribution of the neutral particle beamlets w a s recorded b y scanning a diamond detector across the beamlet at a certain distance from the interaction point while the main beam of the H- ions w a s deflected using the dipole magnet installed upstream the detector. Measuring the profile of the beamlet b y scanning the laser across the beam allows to directly measure the transverse phase-space distribution and reconstruct the transverse beam emittance. In this report w e will describe the analysis of the data collected during the 3 MeV and 12 MeV operation of the Linac 4. W e will discuss the hardware status and future plans.
Original language | English |
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Title of host publication | 6th International Particle Accelerator Conference, IPAC 2015 |
Publisher | Joint Accelerator Conferences Website (JACoW) |
Pages | 1146-1149 |
Number of pages | 4 |
ISBN (Electronic) | 9783954501687 |
Publication status | Published - 2015 |
Externally published | Yes |
Event | 6th International Particle Accelerator Conference, IPAC 2015 - Richmond, United States Duration: 3 May 2015 → 8 May 2015 |
Conference
Conference | 6th International Particle Accelerator Conference, IPAC 2015 |
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Country | United States |
City | Richmond |
Period | 3.5.15 → 8.5.15 |
ASJC Scopus subject areas
- Nuclear and High Energy Physics
- Atomic and Molecular Physics, and Optics