A Thin-Walled Multichannel Air Ionization Chamber

Potashev, S. I.; Akulinichev, S. V.; Burmistrov, Yu. M.; Drachev, A. I.; Mordovskoi, M. V.

doi:10.1023/b:inet.0000038400.19678.36

Cited by 4 publications

(5 citation statements)

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“…The number of primary electrons in the collection mode (in the voltage interval of 450-660V) could be rather precisely calculated which gave a reliable calibration cross-check. 2 Note that signals produced by 55 Fe appeared at much higher voltages than signals produced by alpha particles because the primary ionization induced by the 6 keV photons is much smaller than for the alpha particles. Therefore, to achieve the same signal amplitudes for 6 keV photons and alpha particles higher gains are required for the photons.…”

Section: Single Retgemmentioning

confidence: 98%

“…We called this detector Resistive Electrode TGEM or RETGEM. Dielectric coating together with dielectric rims made this detector extremely robust enabling it to operate in air containing dust 2 . RETGEMs with the following geometrical characteristics were used in this work: thickness 0.5 -1mm, diameter of holes 0.3-0.5mm , pitch 0.6-0.8mm.…”

Section: Iii-2experimental Set Up and The Detector's Designmentioning

confidence: 99%

“…where N nair is the counting rate in air when the alpha particles were shielded by an Al foil. 2 We also measured the alphas signals vs. applied voltages to the drift electrode when the top and the bottom RETGEM electrodes were interconnected and their combined signal was fed to the chargesensitive amplifier. The signal amplitudes increased with voltage up to a 200 V and saturated above that level.…”

Section: Single Retgemmentioning

confidence: 99%

“…In some applications, like dosimetry (see for example [1]) or therapeutic beam monitoring (see for example [2]) it is very attractive to use gaseous detectors operating in air. Indeed, various designs of ionization chambers operating in air were already developed, built and nowadays are successfully used not only in research laboratories but also in many practical applications (see for example [3]).…”

Section: Introductionmentioning

confidence: 99%

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Detectors for alpha particles and X-rays operating in ambient air in pulse counting mode or/and with gas amplification

et al. 2008

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Ionization chambers working in ambient air in current detection mode are attractive due to their simplicity and low cost and are widely used in several applications such as smoke detection, dosimetry, therapeutic beam monitoring and cetera. The aim of this work was to investigate if gaseous detectors can operate in ambient air in pulse counting mode as well as with gas amplification which potentially offers the highest possible sensitivity in some measurements for example for alpha particle detection or high energy x-ray photon or electron detection. To investigate the feasibility of this method two types of open-end gaseous detectors were build and successfully tested. The first one was a single wire or multiwire cylindrical geometry detector operating in pulse mode at a gas gain of one (pulse ionization chamber). This detector was readout by a custom made wide -band charge sensitive amplifier able to deal with slow induced signals generated by slow motion of negative and positive ions. The multiwire detector was able to detect alpha particles with efficiency close to 22%. The second type alpha detector was an innovative GEM-like detector with resistive electrodes operating in air in avalanche mode at high gas gains (up to 10 4 ). This detector can also operate in a cascaded mode or be combined with other detectors, for example with MICROMEGAS. This detector was readout by a conventional charge -sensitive amplifier and was able to detect alpha particles with 100% efficiency. This detector could also detect x-rays photons or fast electrons. A detailed comparison between these two detectors is given as well as comparison with the commercially available alpha detectors. The main advantages of gaseous detectors operating in air in a pulse detection mode are their simplicity, low cost and high sensitivity. One of the possible applications of these new detectors is alpha particle background monitors which, due to their low cost can find wide application not only in houses, but in public areas: airports, railway station and so on.

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Section: Single Retgemmentioning

confidence: 98%

Section: Iii-2experimental Set Up and The Detector's Designmentioning

confidence: 99%

Section: Single Retgemmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Detectors for alpha particles and X-rays operating in ambient air in pulse counting mode or/and with gas amplification

et al. 2008

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“…In experimental nuclear physics two ways of registration of ionizing radiation by mean of air gas detectors most are widely adopted. Along with integrated ionization chambers, which measure a total ionization for a certain period, there is other class of the so-called pulse ionization chambers intended for registration of impulses of current when passing via detector of separate ionizing particles [1][2][3][4].The design both types of the chambers differs from each other a little. Distinction consists only in electronic methods of reading of size of ionization current.…”

Section: Introductionmentioning

confidence: 99%

Open Detector of Alpha Particles based on GEM-like Structure

Razin¹

2015

ujpa

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This paper presents the results of studies of the characteristics of alpha particles detector like TGEM ("Thick" Gas Electron Multiplier) working in an open air environment. The main advantages of these devices are simplicity, low cost, and high sensitivity to the different kinds of irradiation. One of the possible applications of these new wireless gas detectors is alpha particle or radon background monitors, which can serve also as a dosimeter or as a smoke detector in houses. This detector is able to measure the trace of alpha particles with efficiency close to 100% operating in open air in the avalanche mode at high gas gain (up 10 4). The tests were carried out in duty of three summer months. It should be noted that the stability of the results is high enough despite the wide range of temperature and humidity during of testing.

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