TY  - JOUR
AU  - NEXT Collaboration (Haefner, J. et al
AU  - Benlloch-Rodriguez, J. M.
AU  - Carcel, S.
AU  - Carrion, J. V.
AU  - Martin-Albo, J.
AU  - Martinez-Vara, M.
AU  - Muñoz Vidal, J.
AU  - Novella, P.
AU  - Querol, M.
AU  - Romo-Luque, C.
AU  - Sorel, M.
AU  - Uson, A.
PY  - 2023
DA  - 2023//
TI  - Reflectance and fluorescence characteristics of PTFE coated with TPB at visible, UV, and VUV as a function of thickness
T2  - J. Instrum.
JO  - Journal of Instrumentation
SP  - P03016 - 21pp
VL  - 18
IS  - 3
PB  - IOP Publishing Ltd
KW  - Materials for gaseous detectors
KW  - Particle tracking detectors (Gaseous detectors)
KW  - Time projection chambers
AB  - Polytetrafluoroethylene (PTFE) is an excellent diffuse reflector widely used in light collection systems for particle physics experiments. In noble element systems, it is often coated with tetraphenyl butadiene (TPB) to allow detection of vacuum ultraviolet scintillation light. In this work this dependence is investigated for PTFE coated with TPB in air for light of wavelengths of 200 nm, 260 nm, and 450 nm. The results show that TPB-coated PTFE has a reflectance of approximately 92% for thicknesses ranging from 5 mm to 10 mm at 450 nm, with negligible variation as a function of thickness within this range. A cross-check of these results using an argon chamber supports the conclusion that the change in thickness from 5 mm to 10 mm does not affect significantly the light response at 128 nm. Our results indicate that pieces of TPB-coated PTFE thinner than the typical 10 mm can be used in particle physics detectors without compromising the light signal.
SN  - 1748-0221
UR  - https://arxiv.org/abs/2211.05024
UR  - https://doi.org/10.1088/1748-0221/18/03/P03016
DO  - 10.1088/1748-0221/18/03/P03016
LA  - English
N1  - WOS:000971136300003
ID  - NEXTCollaborationHaefner_etal2023
ER  -