Publications
Publication Information
| Title | The CLAS12 Central Time-of-Flight System |
| Authors | Daniel Carman, Gegham Asryan, Vitaly Baturin, Louise Clark, Raffaella De Vita, Wooyoung Kim, Robert Miller, Cyril Wiggins |
| JLAB number | JLAB-PHY-20-2926 |
| LANL number | (None) |
| Other number | DOE/OR/23177-4916 |
| Document Type(s) | (Journal Article) |
| Associated with EIC: | No |
| Supported by Jefferson Lab LDRD Funding: | No |
| Funding Source: | Nuclear Physics (NP) |
| Other Funding: | Department of Energy |
|
Journal Compiled for Nuclear Instruments & Methods in Physics Research, Section A Page(s) 163626 Refereed | |
| Publication Abstract: | The Central Time-of-Flight system for the large-acceptance CLAS12 spectrometer in Hall~B at the Thomas Jefferson National Accelerator Facility is described. The system consists of a hermetic barrel of 48 scintillation counters at a radius of 25~cm from the beamline. The wedge-shaped counters are 3.4~cm wide, 3.0~cm thick, and 90~cm long, and span a range of polar angles relative to the center of the nominal target location from roughly 35$^\circ$ to 125$^\circ$. The counters reside in the 5-T field of the CLAS12 superconducting solenoid. The bars are read out via bent light guides 1~m long on the upstream end of the counters and 1.6~m long on the downstream end. The phototubes are shielded by a multi-layer dynamical magnetic shield system to reduce the local fringe fields in the range from 400~G to 1000~G down to the level of 0.2~G at the location of the photocathodes. The average effective time resolution of the counters is 80~ps. |
| Experiment Numbers: | |
| Group: | Hall B |
| Document: | |
| DOI: | https://doi.org/10.1016/j.nima.2020.163626 |
| Accepted Manuscript: | ctof-nim.pdf |
| Supporting Documents: | |
| Supporting Datasets: | |