| Article | |
| Report number | CERN-PBC-CONF-2024-004 |
| Title | Characterisation of the optics of the TT24 and P42 beamlines in the CERN SPS North Area |
| Author(s) | Dyks, Luke Aidan (University of Oxford (GB)) ; Banerjee, Dipanwita (CERN) ; Baratto Roldan, Anna (CERN) ; Bernhard, Johannes (CERN) ; Brugger, Markus (CERN) ; Charitonidis, Nikolaos (CERN) ; Fraser, Matthew Alexander (CERN) ; Gatignon, Lau (Lancaster University (GB)) ; Goillot, Alice Marie (CERN) ; Gorn, Aleksandr (CERN) ; Jebramcik, Marc Andre (CERN) ; Metzger, Fabian (CERN) ; Murphy, Rob (University of London (GB)) ; Nevay, Laurence James (CERN) ; Parozzi, Elisabetta Giulia (Universita & INFN, Milano-Bicocca (IT)) ; Rae, Bastien (CERN) ; Schuh-Erhard, Silvia (CERN) ; Stummer, Florian Wolfgang (University of London (GB)) ; Van Dijk, Maarten (CERN) ; Velotti, Francesco Maria (CERN) ; Zickler, Thomas (CERN) |
| Publication | 2024 |
| Imprint | 2024-06-19 |
| Number of pages | 4 |
| Published in: | JACoW IPAC2024 (2023) TUPC74 |
| Presented at | 15th International Particle Accelerator Conference (IPAC 2024) |
| DOI | 10.18429/JACoW-IPAC2024-TUPC74 |
| Subject category | Accelerators and Storage Rings |
| Study | Physics Beyond Colliders |
| Project | Beam Dump Facility ; Conventional Beams |
| Keywords | Physics Beyond Colliders |
| Abstract | 400 GeV protons extracted from the CERN SPS are transported to the T4 target via the TT20 transfer line. The P42 beamline then transports the protons that did not interact in the T4 target to the T10 target. During operation in 2021 and 2022, higher than expected beam losses were measured, in addition to the increased beam spot size that had previously been observed. It was previously suspected that the optics between TT24 and P42 might not be well matched but due to a lack of instrumentation this was not confirmed. The recent installation of additional beam profile monitors (BSG) in the P42 beamline has allowed the present optics to be evaluated for the first time. In addition, magnet response functions have been re-measured and updated. A kick response study was performed using corrector dipoles to kick the beam with the subsequent displacement measured on the BSGs. The dependence between the kick and the beam position was used to fit a MADX optics model of TT24 and P42. Quadrupole scans were then performed to determine the initial conditions of the model. These results are presented in this paper. |
| Other source | Inspire |
| Submitted by | johannes.bernhard@cern.ch |
Rekord stworzony 2024-06-19, ostatnia modyfikacja 2024-10-08