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Design and operation of a windowless gas target internal to a solenoidal magnet for use with a megawatt electron beam
Name
1903.02648.pdf
Description
Accepted version
Size
7.96 MB
Format
Adobe PDF
Checksum (MD5)
652a5bbc25f2e89db2bae421dd9006ca
Date Issued
2019
Journal
Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Publisher
Elsevier BV
Version
Author's final manuscript
Abstract
© 2019 Elsevier B.V. A windowless hydrogen gas target of nominal thickness 1019 cm−2 is an essential component of the DarkLight experiment, which is designed to utilize the megawatt electron beam at an Energy Recovery Linac (ERL). The design of such a target is challenging because the pressure drops by many orders of magnitude between the central, high-density section of the target and the surrounding beamline, resulting in laminar, transitional, and finally molecular flow regimes. The target system was assembled and operated at Jefferson Lab's Low Energy Recirculator Facility (LERF) in 2016, and subsequently underwent several revisions and calibration tests at MIT Bates in 2017. The system at dynamic equilibrium was simulated in COMSOL to provide a better understanding of its optimal operation at other working points. We have determined that a windowless gas target with sufficiently high density for DarkLight's experimental needs is feasible in an ERL environment.
Terms of Use
Creative Commons Attribution-NonCommercial-NoDerivs License
Persistent DSpace Link
DOI of Published Version
10.1016/J.NIMA.2019.05.071
