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 |
|---|---|
| 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 |
|---|---|
| Country | United States |
| City | Richmond |
| Period | 3.5.15 → 8.5.15 |
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ASJC Scopus subject areas
- Nuclear and High Energy Physics
- Atomic and Molecular Physics, and Optics
Cite this
Laserwire emittance scanner at CERN LINAC4. / Kruchinin, K. O.; Boorman, G.; Bosco, A.; Gibson, S. M.; Karataev, P.; Bravin, E.; Hofmann, T.; Raich, U.; Roncarolo, F.; Zocca, F.; Pozimski, J.; Letchford, A. P.
6th International Particle Accelerator Conference, IPAC 2015. Joint Accelerator Conferences Website (JACoW), 2015. p. 1146-1149.Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
}
TY - GEN
T1 - Laserwire emittance scanner at CERN LINAC4
AU - Kruchinin, K. O.
AU - Boorman, G.
AU - Bosco, A.
AU - Gibson, S. M.
AU - Karataev, P.
AU - Bravin, E.
AU - Hofmann, T.
AU - Raich, U.
AU - Roncarolo, F.
AU - Zocca, F.
AU - Pozimski, J.
AU - Letchford, A. P.
PY - 2015
Y1 - 2015
N2 - 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.
AB - 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.
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UR - http://www.scopus.com/inward/citedby.url?scp=84994592394&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:84994592394
SP - 1146
EP - 1149
BT - 6th International Particle Accelerator Conference, IPAC 2015
PB - Joint Accelerator Conferences Website (JACoW)
ER -