Measurement of Pressure Dependent Fluorescence Yield of Air: Calibration Factor for UHECR Detectors

Journal Article · Wed Jul 06 00:00:00 EDT 2005 · Astroparticle Physics

OSTI ID:878868

Belz, J W; Burt, G W; Cao, Z; Chang, F Y; Chen, C C; Chen, C W; Chen, P; Field, C; Findlay, J; Huntemeyer, Petra; Huang, M A; Hwang, W -Y.P.; Iverson, R; Jones, B F; Jui, C C.H.; Kirn, M; Lin, G -L; Loh, E C; Maestas, M M; Manago, N ; Martens, K

In a test experiment at the Final Focus Test Beam of the Stanford Linear Accelerator Center, the fluorescence yield of 28.5 GeV electrons in air and nitrogen was measured. The measured photon yields between 300 and 400 nm at 1 atm and 29 C are Y(760 Torr){sup air} = 4.42 {+-} 0.73 and Y(760 Torr){sup N{sub 2}} = 29.2 {+-} 4.8 photons per electron per meter. Assuming that the fluorescence yield is proportional to the energy deposition of a charged particle traveling through air, good agreement with measurements at lower particle energies is observed.

• Research Organization: SLAC National Accelerator Lab., Menlo Park, CA (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC02-76SF00515
• OSTI ID: 878868
• Report Number(s): SLAC-PUB-11254; astro-ph/0506741; TRN: US0602635
• Journal Information: Astroparticle Physics, Vol. 25
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
CALIBRATION
CHARGED PARTICLES
ELECTRONS
FLUORESCENCE
NITROGEN
PHOTONS
STANFORD LINEAR ACCELERATOR CENTER
Astrophysics
ASTRO
INST