Silver-lined proportional counter for detection of pulsed neutrons

Dighe, P.M.; Prasad, K. R.; Kataria, S. K.

doi:10.1016/j.nima.2003.12.037

Cited by 8 publications

(2 citation statements)

References 8 publications

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“…One way to deal with the problem of PNF is to use an activation detector and there has been extensive research in this fields since the 70s [6,7]. A considerable effort has recently been made on the improvement of silver-activation detectors [8,9], for which experiments have shown good linearity in pulsed fields [9]. This detector has low neutron sensitivity, around 9 counts per mSv for a bare 252 Cf source [10].…”

Section: Introductionmentioning

confidence: 99%

LUPIN, a new instrument for pulsed neutron fields

Caresana

Ferrarini

Manessi

et al. 2013

Nuclear Instruments and Methods in Physics Research Section A:

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HeNeutron detection Pulsed field Linac Proportional counter Logarithmic amplifier a b s t r a c t A number of studies focused in the last decades on the development of survey meters to be used in pulsed radiation fields. This is a topic attracting widespread interest for applications such as radiation protection and beam diagnostics in accelerators. This paper describes a new instrument specifically conceived for applications in pulsed neutron fields (PNF). The detector, called LUPIN, is a rem counter type instrument consisting of a 3 He proportional counter placed inside a spherical moderator. It works in current mode with a front-end electronics consisting of a current-voltage logarithmic amplifier, whose output signal is acquired with an ADC and processed on a PC. This alternative signal processing allows the instrument to be used in PNF without being affected by saturation effects. Moreover, it has a measurement capability ranging over many orders of burst intensity. Despite the fact that it works in current mode, it can measure a single neutron interaction. The LUPIN was first calibrated in CERN's calibration laboratory with a PuBe source. Measurements were carried out under various experimental conditions at the Helmholtz-Zentrum in Berlin, in the stray field at various locations of the CERN Proton Synchrotron complex and around a radiotherapy linear accelerator at the S. Raffaele hospital in Milan. The detector can withstand single bursts with values of Hn(10) up to 16 nSv/burst without showing any saturation effect. It efficiently works in pulsed stray fields, where a conventional rem-counter underestimates by a factor of 2. It is also able to reject the very intense and pulsed photon contribution that often accompanies the neutron field with good reliability.

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Section: Introductionmentioning

confidence: 99%

LUPIN, a new instrument for pulsed neutron fields

Caresana

Ferrarini

Manessi

et al. 2013

Nuclear Instruments and Methods in Physics Research Section A:

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“…Here, the pulsed bremsstrahlung that is produced due to beam losses and scattering of electrons by the molecules of the residual gas in the vacuum pipes, gives rise to pulsed photoneutron flux [1] that needs to be measured for reasons of personal safety and monitoring the accelerator performance. Therefore for this requirement silver lined proportional counter has been developed [3] which is mechanically rugged and has all welded construction. Passive pulsed neutron monitoring using foil activation method such as Gold, Indium, Rhodium or Silver foils has been described in literature.…”

Section: Introductionmentioning

confidence: 99%

Pulsed Neutron Monitoring at High Energy Electron Accelerators with Silver Lined Proportional Counter

Dighe¹,

Ghodgaonkar²,

Dhairyawan³

et al. 2007

AIP Conference Proceedings

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Pulsed laser deposition with simultaneous in situ real-time monitoring of optical spectroscopic ellipsometry and reflection high-energy electron diffraction Rev. Sci. Instrum. 84, 043902 (2013); 10.1063/1.4798621 Novel fast-neutron activation counter for high repetition rate measurements Rev. Sci. Instrum. 77, 10E713 (2006); 10.1063/1.2227442Thin-window high-efficiency position sensitive proportional counter for the vacuum flat crystal spectrometers on the Lawrence Livermore National Laboratory electron beam ion trap (abstract) Rev. Sci.Abstract. To meet the challenging requirement of pulsed neutron background measurement, which is present around electron accelerators at the Indus-1 facility of the Raja Ramanna Centre for Advanced Technology (RRCAT) Indore, a silver lined proportional counter with 0.2cps/n cm -2 s -1 thermal neutron sensitivity has been developed. The detector has been tested for its performance in continuous thermal neutron field at Apsara reactor and in pulsed neutron field at Indus-1 facility. The detector shows ±11% signal linearity at various reactor powers and follows the silver decay scheme during reactor scram experiment. Off-line measurements made in pulsed neutron background at the Indus-1 facility compare well with nuclear track detectors (CR-39). For monitoring on-line neutron flux, electronic gating circuit was used that can switch off the scalar counter unit during the prompt X-ray response of the detector taking trigger pulse from the accelerator and experiments showed that the neutron flux measured by the detector is in close agreement with CR-39 values.

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A modified neutron dose-equivalent meter for pulsed neutron radiation field

Weizhen

Kang

2009

Nuclear Instruments and Methods in Physics Research Section A:

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Silver-lined proportional counter for detection of pulsed neutrons

Cited by 8 publications

References 8 publications

LUPIN, a new instrument for pulsed neutron fields

LUPIN, a new instrument for pulsed neutron fields

Pulsed Neutron Monitoring at High Energy Electron Accelerators with Silver Lined Proportional Counter

A modified neutron dose-equivalent meter for pulsed neutron radiation field

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