Aumann, T.

Basu, J.

Basu, P.

Bemmerer, D.

Bhattachaya, S.

Boretzky, K.

Chakraborty, S.

Chatterjee, S.

Das, P. K.

Datta Pramanik, U.

Elekes, Z.

Gonzalez-Diaz, D.

Kempe, M.

Panja, J.

Rahaman, A.

Ray, J.

Simon, H.

Sobiella, M.

Stach, D.

Wagner, A.

Yakorev, D.

GSI Repository

GSITemplate2007R&D for NeuLAND development for R3B, FAIR at SINP, KolkataU. Datta PramaniK1#, T. Aumann2, K. Boretzky2, P. Basu1, J.Basu1, S. Bhattachaya1, D. Bemmerer3, S. Chakraborty1, S. Chatterjee1, P.K.Das1, Z. Elekes3, D.Gonzalez-Diaz2, M.Kempe3, J.Panja1, A.Rahaman1, J.Ray1, H.Simon2, M.Sobiella3, D.Stach3, A.Wagner3, D.Yakorev3 for R3B collaboration1Saha Institute of Nuclear Physics, Kolkata, India; 2GSI, Darmstadt, Germany; 3 HZDR Dresden-Rossendorf, Germany   In the upcoming R3B-FAIR facility, to achievethe design goal for high resolution neutron time-of-flight[1,2], various types of prototypes have been explored at several places [3,4,5,6]. The possible candidates for ac-tive material of such a spectrometer can be either Multi-gap Resistive Plate Chamber (MRPC) or conventionalplastic scintillators. At initial stage of NeuLAND devel-opment, at Saha Institute of Nuclear Physics, Kolkata, MRPC design feasibility was studied extensively[3,5]. Multi-strip Multi-gap Resistive Plate Chambers(MMRPC) has been built at SINP, Kolkata using localinfrastructure (SINP workshop, dedicated laboratory, etc.)and major local raw materials [3]. The design of the de-tector elements is as followed: double stack MRPC withglass resistive plates and two gas gaps of 0.3 mm,each[3]. The Anode plate was segmented with 2cm widestrip. The detector was first tested in the laboratory usingcosmic muons and gamma rays in coincidence with ce-rium doped LaBr3 detector. Fig. 1 shows the experimentalsetup for testing MMRPC in coincidence with LaBr3:Cedetector. Timing response corresponding to cosmicmuons was observed to be around 150±30ps without slew correction.The electron response of our developed detectorwas studied using the electron linac ELBE at Helmholtz-Zentrum Dresden-Rossendorf. The electron energy waschosen to 29 MeV with pulse width less than 10 ps. Tofind the optimum operational condition of the prototype,the detector was scanned with beam focused on a singlestrip of MMRPC. Measurements were also performedwith the beam spot focused on each of the other individ-ual strips of MMRPC. The absolute efficiency of the de-tector was measured to be more than 90% with cathode voltage above -7KV. Fig. 2(a) shows the 2-D plot forslew corrected ToF of developed MMRPC against depos-ited charge on a single strip. Measured time resolution(σt) after slew correction was 98.0±2.7 ps (Fig. 2(b)). Po-sition information was extracted from the difference intime from either end of a strip. Position resolution alongthe strip (σx) was found to be 1.9±0.7 cm.                 Recently, an extensive test and characterizationof Plastic scintillators have been started at our laboratoryat SINP, Kolkata. In laboratory, various types of plasticscintillator (BC408, BC422q etc) of several dimensioncoupled with PMTs at both ends have been procured.                     Fig: 1 Fig: 2 (a)Fig: 2 (b)Fig. 1: Testing of MMRPC in coincidence with LaBr3:Ce detector at SINP laboratory;  Fig 2(a) Slew corrected time vs charge deposition for electron at ELBE; Fig 2(b) Slewcorrected ToF spectrum of MMRPCDetectorspecification(PMT type)Bias Voltage (V)Rise time(ns)Decaytime(ns)Pulse Height(mV)HPK H3164-10-1200 0.8-1.2 ~80 200-300HPK H6533 -2000 1.2-2 ~80 200-320Table - I: Properties of the various plastic scintillatortested at SINP Laboratory.Response of these detectors to gamma and charge particlehas been studied using available radioactive source 60Co,152Eu, 22Na, 241Am etc. Timing responses are comparable with MMRPC. More extensive studies are going on.References[1] R3B Technical report.[2]NeuLand@R3B: A Fully-Active Detector for TOF offast neuron:http: //www.faircentre.de/fileadmin/fair/ ex-periments/NUSTAR/Pdf?TDRs/NeuLand-TDR-Web.pdf[3] U. DattaPramanik et al., NIM A 661 (2012) S149.[4] K.Boretzky et al, “Neuland@R3B- A Progress re-port”, GSI scientific report 2012.[5]U.Datta Pramanik et al, DAE,http://sympnp.org/proceedings/56/G12.pdf[6]Z.Elekes et al, NIMA 701 (2013) 86._________________________*Supported by Dept. of Atomic Energy, Govt. of India#ushasi.dattapramanik@saha.ac.inGSI SCIENTIFIC REPORT 2012 PHN-ENNA-EXP-61193

R&D for NeuLAND development for R3B, FAIR at SINP, Kolkata

http://repository.gsi.de/record/52094/files/PHN-ENNA-EXP-61.pdf

R&D for NeuLAND development for R3B, FAIR at SINP, Kolkata

Abstract

Similar works

Full text

Available Versions

GSI Repository