TY  - JOUR
AU  - Lindstroem, Carl Andreas
AU  - D'Arcy, R.
AU  - Garland, M. J.
AU  - Gonzalez Caminal, Pau
AU  - Schmidt, Bernhard
AU  - Schröder, Sarah
AU  - Wesch, S.
AU  - Osterhoff, J.
TI  - Matching small beta functions using centroid jitter and two beam position monitors
JO  - Physical review accelerators and beams
VL  - 23
IS  - 5
SN  - 2469-9888
CY  - College Park, MD
PB  - American Physical Society
M1  - PUBDB-2020-02357
M1  - arXiv:2002.06022
M1  - DESY-20-038
SP  - 052802
PY  - 2020
N1  - 8 pages, 7 figures ; publication: Phys.Rev.Accel.Beams 23 5 (2020) 052802 ; ;
AB  - Matching to small beta functions is required to preserve emittance in plasma accelerators. The plasma wake provides strong focusing fields, which typically require beta functions on the mm-scale, comparable to those found in the final focusing of a linear collider. Such beams can be time consuming to experimentally produce and diagnose. We present a simple, fast, and noninvasive method to measure Twiss parameters in a linac using two beam position monitors only, relying on the similarity of the beam phase space and the jitter phase space. By benchmarking against conventional quadrupole scans, the viability of this technique was experimentally demonstrated at the FLASHForward plasma-accelerator facility.
KW  - beam: phase space (INSPIRE)
KW  - accelerator: plasma (INSPIRE)
KW  - plasma: wake field (INSPIRE)
KW  - beta function (INSPIRE)
KW  - beam position: monitoring (INSPIRE)
KW  - two-beam (INSPIRE)
KW  - measurement methods (INSPIRE)
KW  - beam optics (INSPIRE)
KW  - beam focusing (INSPIRE)
KW  - numerical calculations: Monte Carlo (INSPIRE)
KW  - DESY Lab (INSPIRE)
KW  - chromaticity (INSPIRE)
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000535863300001
DO  - DOI:10.1103/PhysRevAccelBeams.23.052802
UR  - https://bib-pubdb1.desy.de/record/441179
ER  -