| Internal Note | |
| Report number | CERN-ACC-NOTE-2020-0006 |
| Title | ATF2 Ultra-low βy∗ study report for March 2019 run |
| Author(s) | Cilento, Vera (Université Paris-Saclay (FR)) ; Pastushenko, Andrii (Université Paris-Saclay (FR)) ; Yang, Renjun (CERN) ; Tomas Garcia, Rogelio (CERN) ; Faus-Golfe, Angeles (Centre National de la Recherche Scientifique (FR)) ; Terunuma, Nobuhiro ; Okugi, Toshiyuki (KEK) ; Kubo, Kiyoshi |
| Corporate author(s) | CERN. Geneva. ATS Department |
| Publication | 2020 |
| Imprint | 16 Jan 2020 |
| Number of pages | 15 |
| Subject category | Accelerators and Storage Rings |
| Keywords | CLIC ; ATF2 ; Beam Delivery System ; Final Focus System |
| Abstract | One of the main requests for future linear colliders is to achieve a nanometer vertical beam size at the Interaction Point (IP). Accelerator Test Facility 2 (ATF2) represents a scale down implementation of the final focus system (FFS) concept based to test the novel local chromaticity correction scheme that is implemented in the International Linear Collider (ILC) and the Compact Linear Collider (CLIC) designs. After several years of operations and commissioning, σy∗ of 41 ± 3 nm was measured at ATF2 with the nominal βy∗ optics in 2016. This paper reports the experimental tuning study done with the ultra-low βy∗ during March 2019 beam operation. This optics has a level of chromaticity comparable with CLIC one and it is expected to reduce σy∗ below 40 nm. |
| Submitted by | alessia.valenza@cern.ch |
Record created 2020-01-16, last modified 2020-01-17