Single photoelectron time spread measurement of fast photomultipliers

Leskovar, B.; Lo, C. C.

doi:10.1016/0029-554x(75)90090-7

Cited by 71 publications

(7 citation statements)

References 15 publications

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“…This bunch-width monitor (BWM) employed multianode microchannel plate (MCP) and constant-fraction discriminators (CFDs) [19]. An MCP has high sensitivity to low-energy single muons [20,21].…”

Section: Introductionmentioning

confidence: 99%

Development of a bunch-width monitor for low-intensity muon beam below a few MeV

Sue

Yotsuzuka

Futatsukawa

et al. 2020

Phys. Rev. Accel. Beams

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A destructive monitor to measure the longitudinal bunch width of a low-energy and low-intensity muon beam was developed. This bunch-width monitor (BWM) employed microchannel plates to detect a single muon with high time resolution. In addition, constant-fraction discriminators were adopted to suppress the time-walk effect. The time resolution was measured to be 65 ps in rms using a picosecond-pulsed laser. This resolution satisfied the requirements of the muon linac of the J-PARC E34 experiment. We measured the bunch width of negative-muonium ions (μ þ e − e −) accelerated with a radio-frequency quadrupole using the BWM. The bunch width was successfully measured to be σ ¼ 0.54 AE 0.11 ns, which is consistent with the simulation.

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Section: Introductionmentioning

confidence: 99%

Development of a bunch-width monitor for low-intensity muon beam below a few MeV

Sue

Yotsuzuka

Futatsukawa

et al. 2020

Phys. Rev. Accel. Beams

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“…The decay time measurement method utilized a modified Bollinger and Thomas technique [9] with single photoelectron (PE) method [10], [11]. Two RCA C31024 PMT's with 200 ps time resolution [12] were used in coincidence, with the first (TAC Start) triggering on the prompt ( 1 PE) signal and the second (TAC Stop) triggering at the single PE level.…”

Section: Methodsmentioning

confidence: 99%

Characterization of fluor concentration and geometry in organic scintillators for in situ beta imaging

Tornai¹,

Hoffman²,

MacDonald

et al. 1996

IEEE Trans. Nucl. Sci.

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Development of a small area (1-2 cm 2) in situ in situ in situ beta imaging device includes optimization of the front end scintillation detector, which is fiber optically coupled to a remote photon detector. Thin plastic scintillation detectors, which are sensitive to charged particles, are the ideal detectors due to the low sensitivity to ambient gamma backgrounds. The light output of a new binary plastic scintillator was investigated with respect to increasing concentrations of the fluor (0.5-2.0% by weight) and varying thickness cylindrical configurations of the intended imaging detector. The fluor had an emission maximum increasing from 431 to 436 nm with increasing fluor concentration. The decay time(s) had two components (0.38 and 1.74 ns). There was an 20% increase in light output with increasing fluor concentration, measured with both 204 Tl betas and conversion electrons from 207 Bi. The highest light output of this new scintillator was measured to be 30% lower than BC404. Simulations predicted the 1.5 mm scintillator thickness at which light output and energy absorption for 700 keV electrons (e.g., from 204 Tl, 18 F) were maximized, which corresponded with measurements. As beta continua are relatively featureless, energy calibration for the thin scintillators was investigated using Landau distributions, which appear as distinct peaks in the spectra. As the scintillators were made thinner, gamma backgrounds were shown to linearly decrease.

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“…5. For both types of photomul-ipliers, the slngle-photoelectron time spread has been measured as a function of the voltage ratio between the photocathode-focuslng electrode and photocathode-flrst dynode, (VC-VFE)'( V C-V D1)> to de termine the optimum operating conditions.…”

Section: Optimization Of Pftotmhlmpher Operatingmentioning

confidence: 99%

“…To In crease the Input amplitude dynamic range of the dis criminator, the bipolar pulse Is further reyllfled and peak limited before being applied to zero-crossing To evaluate the performance of the constant-frac tion discriminator, the system described 1n Ref. 5 was used to measure the time walk and resolution of the discriminator as a function of input pulse ampli tude. Figure 3 shows the result of the measurement.…”

Section: Constant-fraction Discriminator Considerationsmentioning

confidence: 99%

Nanosecond Fluorescence Spectroscopy

Leskovar

1985

IEEE Trans. Nucl. Sci.

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This article is a summary of a short course lec ture given in conjunction with the 1984 Nuclear Sci ence Symposium. Measuring systems for nanosecond fluorescence spectroscopy using single-photon count ing techniques are presented. These involve systems based on relaxation-type spark gap light pulser and synchronously pumped mode-locked dye lasers. Further more, typical characteristics and optimization of op erating conditions of the critical components respon sible for the system time resolution are discussed. A short comparison of the most important deconvolution methods for numerical analysis of experimental data 15 given particularly with respect to the signal-tonoise ratio of the fluorescence signal.

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Single photoelectron time spread measurement of fast photomultipliers

Cited by 71 publications

References 15 publications

Development of a bunch-width monitor for low-intensity muon beam below a few MeV

Development of a bunch-width monitor for low-intensity muon beam below a few MeV

Characterization of fluor concentration and geometry in organic scintillators for in situ beta imaging

Nanosecond Fluorescence Spectroscopy

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