A successful application of thinner-THGEMs

Abstract

The performance of thinner-THGEMs (Thick Gaseous Electron Multipliers) with 0.2 mm thickness, 0.2 mm hole diameter, 0.7 mm pitch and a narrow (5 ∼ 20 μm) rim has been studied. In general, the prototype has a gain of 1 × 103 ∼ 4 with one single thinner-THGEM in Ar/iC4H10 (97:3) and works stably at high rates. A curved parallax-free gas detector based on thinner-THGEM has been developed for diffraction studies, and has been tested at the Beijing Synchrotron Radiation Facility (BSRF). The result shows an angular resolution of 0.148 degree can be achieved with direct current data acquisition mode.

The Resistive-Plate WELL with Argon mixtures – A robust gaseous radiation detector

“…The broad interest in THGEMbased detectors has resulted in the development of production techniques and concepts (e.g. [3,4]), including the use of resistive films and materials for reducing occasional discharge effects [5][6][7]. In this context, the experience gained with various configurations of THGEM-based multipliers with resistive anodes [7][8][9] has led to the development of a particularly promising candidate -the Resistive-Plate WELL (RPWELL) [10].…”

Study of a sealed high gas pressure THGEM detector and response of alpha particle spectra

“…They are produced at University of Chinese Academy of Sciences (UCAS) and the Second Academy of China Aerospace Science and Industry Corporation (CASIC). The structure and characteristic of THGEM is seen in reference [6]. The distance between the cathode mesh and the upper layer of the THGEM, which is the drift region, is 1.5 cm, while the distance between the lower layer of the THGEM and the anodes, which is the induction region, is 0.3 cm.…”

“…THGEMs are robust, low cost and easy to manufacture, with high gain (10 3 -10 5 ), good spatial resolution (sub-mm), high counting rate, and good stability. A special type of thinner-THGEM [4][5][6] was developed domestically in 2011.…”

Study of Thick Gaseous Electron Multipliers Gain Stability and Some Influencing Factors

“…[2−4] In 2011, a type of thinner-THGEM, which is manufactured economically by standard printed-circuit drilling and etching technology, was developed at the University of the Chinese Academy of Sciences (UCAS) and the Institute of High Energy Physics (IHEP) [5] in China. This type of detector has been used in synchrotron radiation experiments [6] and neutron detection. [7] Long-term stability is important for precise measurements.…”

“…From the fitting results, it can be seen that thinner-THGEMs are stable for working over periods of months, with good gain performance over this timescale. In addition, a gain stability test lasting 14 h was carried out previously; [17] the curved thinner-THGEM diffraction meter we developed has been used with good stability for more than one year and the study in high counting rate is studied; [6] and a cosmicray muon hodoscope for teaching experiments, based on the thinner-THGEM, has now worked for two years. [18] This good long-term gain stability is very helpful for experiments using THGEMs, such as sealed gas photomultipliers, tracker chambers and sampling calorimeters.…”