Photon detector performance and radiator scintillation in the HADES RICH

Gernhäuser, R.; Bauer, B.; Friese, J.; Homolka, J.; Kastenmüller, A.; Kienle, P.; Körner, H. J.; Maier-Komor, P.; Münch, M.; Schneider, Roland; Zeitelhack, K.

doi:10.1016/0168-9002(95)01177-3

Cited by 22 publications

(18 citation statements)

References 11 publications

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“…These applications show the benefits of optical read-out, however, accurate information on photon emission properties is required for development of efficient detection systems. To our knowledge, no data on CF 4 photon yield for CF 4 ultraviolet (UV) and visible emission have yet been published for pressures above 0.5 bar, and the literature data for $0.5 bar is very limited [5,6].…”

Section: Introductionmentioning

confidence: 99%

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Photon yield for ultraviolet and visible emission from CF4 excited with α-particles

Morozov

Fraga

Pereira

et al. 2010

Nuclear Instruments and Methods in Physics Research Section B:

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Section: Introductionmentioning

confidence: 99%

“…Emission is spectrally very broad (from vacuum ultraviolet to near infrared), the gas is transparent for its own emission, the emission is fast (radiative lifetimes are below 20 ns [3,4]) and the photon yields are quite high (see e.g. [5,6]). …”

Section: Introductionmentioning

confidence: 99%

Photon yield for ultraviolet and visible emission from CF4 excited with α-particles

Morozov

Fraga

Pereira

et al. 2010

Nuclear Instruments and Methods in Physics Research Section B:

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“…CF 4 had been deemed unsuitable as Cherenkov radiator in other detectors due to the high scintillation yield, particularly for detectors where the photon detection used VUV-sensitive imaging devices based on CsI, TMAE or TEA [4]. Other studies showed similar results [5]. The estimated total scintillation photon yield per MeV of energy deposited in CF 4 was about 1200 photons/MeV Â 4π [4].…”

Section: Introductionmentioning

confidence: 87%

“…About 75% of these photons were estimated to be emitted at wavelengths in the range 220-600 nm. The scintillation in C 4 F 10 is, in comparison to CF 4 , only a minor effect [5]. Our measurements, at room temperature and pressure [6], give a factor $ 40 between the scintillation yields for the two gases (photons/ MeV deposited) in our wavelength range.…”

Section: Introductionmentioning

confidence: 99%

Quenching the scintillation in CF4 Cherenkov gas radiator

Blake¹,

D’Ambrosio²,

Easo³

et al. 2015

Nuclear Instruments and Methods in Physics Research Section A:

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a b s t r a c t CF 4 is used as a Cherenkov gas radiator in one of the Ring Imaging Cherenkov detectors at the LHCb experiment at the CERN Large Hadron Collider. CF 4 is well known to have a high scintillation photon yield in the near and far VUV, UV and in the visible wavelength range. A large flux of scintillation photons in our photon detection acceptance between 200 and 800 nm could compromise the particle identification efficiency. We will show that this scintillation photon emission system can be effectively quenched, consistent with radiationless transitions, with no significant impact on the photons resulting from Cherenkov radiation.

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“…To improve the sensitivity of the chamber detector while maintaining the n/g discrimination ability, we propose using Arþ CF 4 gas mixtures as detection media. In addition, CF 4 is a fascinating gas scintillator, i.e., its emission spectrum ranges from the far-ultraviolet to the nearinfrared with a significant fraction in the visible region [10][11][12]. It has been reported that the secondary emission spectra from CF 4 based noble gas mixtures, e.g., ArþCF 4 or HeþCF 4 , are similar to that of pure CF 4 under X-ray and electron excitation in MicroPattern Gas Detectors (MPGDs) [13][14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%