Estimation of the R134a gas refractive index for use as a Cherenkov radiator, using a high energy charged particle beam

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS

卷:410

Article

Charitonidis, N.¹  Karyotakis, Y.²  Gatignon, L.¹ 

[1] CERN, EN EA, CH-1211 Geneva 23, Switzerland

[2] LAPP, Lab Annecy le Vieux Phys Particules, F-74941 Annecy Le Vieux, France

关键词: Refractive index measurement;    R134a;    Cherenkov gas radiator;   

DOI  :  10.1016/j.nimb.2017.08.020

来源: Elsevier

【 摘 要 】

Gases with relatively high refractive index, n - 1 >= 500 x 10(-6) at atmospheric pressure, giving a satisfactory photoelectron yield at relatively low pressures (<= 5bar) are rare. These gases are often the only practical solution for low momentum particle identification in conventional secondary beam lines. The refractive index of R134a, one of the most common gases available to the physics community, has never been measured or reported. In the present note, the results of a dedicated experiment to estimate the refractive index of R134a, using mixed hadron/electron beams in the range 0.5-10 GeV are presented. (C) 2017 Elsevier B.V. All rights reserved.

【 授权许可】

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