1. Proposal to join RD51 collaboration of NISER
Saikat Biswas
National Institute of Science Education and Research, Bhubaneswar, India
RD51 collaboration meeting, Kolkata, October, 2014 *

2. About NISER
Present transit Institute of Physics Campus, Bhubaneswar
Permanent Jatni in the Khurda District (298 acres) *

3. Activities on EHEP @ NISER
Solenoidal Tracker At RHIC (STAR), in Brookhaven National Laboratory, USA
A Large Ion Collider Experiment (ALICE) at CERN
Positions held by NISER faculties in these experiments
physics analysis coordinator and deputy spokesperson and physics working group convenorship in STAR
Editorial Board of ALICE
NISER is going to participate in upgrade programs of these experiments. These upgrades include gas based detector developments involving frontier technology and innovative ideas *

4. About EHEP lab Present lab: @ IoP Campus, Bhubaneswar (area 300 sq-ft)
New lab: Area sq-ft (900 sq- ft clean room, 600 sq-ft for seating) *

5. Gas mixing system and laminar flow system*

6. Man power Faculty: 2 (one from IoP)
Scientific Officer (trained on gas detector development): 1
Scientific Officer (Experts in Electronics from IoP): 1
Lab operators: 2
Project student: 3
Ph.D. Student: 1 (Proposed)
Post Doc: 2 (Proposed)
Technician: 1 (Proposed) *

7. EHEP Lab status New lab development in progress
IOP lab is being used for the time being
Ar+CO2 (70:30), Argon, Isobutane, Freon (R134a) procured
Gas mixing system exists
Laminar flow table exists
Required electronic modules (like Electronic rack, NIM Crate, HV module, Discriminator, Spectroscopic Amp, SCA, MCA, Pico-ammeter, Multi-meter etc.) procured
One bakelite RPC detector is ready
Studies on plastic scintillator detector is going on
Experiments for Int. M.Sc. and Pre-doc student is going on in the present lab *

8. Components used for Bakelite RPC
30cm × 30cm Bakelite sheets
Thickness of each plate : 3mm
Gas gap between two plates : 2mm
4 edge pressures : 30cm × 8mm
5 button pressures of diameter 1cm(roughly)
2 nozzles of 1mm hole of thickness 2mm
Components of a RPC module: Pick-up strips, edge spacers and gas nozzles,
two graphite coated bakelite sheet *

9. Gluing of edge spacers, button spacers and gas nozzles on one bakelite sheet*

10. Complete RPC module *

11. Circuit diagram for efficiency measurement
Block diagram for efficiency measurement
Trigger (3F) : Sc01 x Sc03 x Sc02
4F : Trigger (3F) x Sc04
Efficiency : 4F/3F
Experimental set-up for efficiency measurement *

12. 3 signals in coincidence
Three scintillator signals in coincidence *

13. Efficiency Vs. voltage
The efficiency reaches a plateau region at nearly 100% from 1500 V onwards, when measured on the PMT side
On the other side the efficiency reaches >90% at little higher voltage
Efficiency of Sc-04 as a function of the applied voltage *

14. Data Logger
Hardware
Variation of t, p and RH with time *

15. Assembled GEM *

16. Work done so far ……
Bakelite resistive plate chamber has been fabricated using local materials
Surface resistivity of the graphite coating has been measured and the uniformity is checked
Four plastic scintillator detectors have been tested systematically
Their efficiencies have been measured using Co60 gamma source
Gamma ray intensity varies with 1/r2
Cosmic ray coincidence has been done
2-fold and 3-fold coincidences have been found to be around 1 per min per cm2
The velocity of the cosmic ray muon has been found to be 2.53 x 108 m/s
A new technique has been developed for gamma ray and cosmic ray spectroscopy without using single channel analyzer (SCA) or multi channel analyzer (MCA)
A Data logger to monitor and record the ambient parameters such as temperature, relative humidity and pressure has been developed
One 10cm X 10cm triple GEM detector has been assembled *

17. Projects done in EHEP lab
Development of Resistive Plate Chamber (RPC) Himangshu Neog, SPS, NISER, 6 months
Detection of particles and gamma photons using plastic scintillators. Akhilesh P Nandan, IISER TVM, 1 month
Development of detectors for high energy physics experiments Sharmili Rudra, Dept. of Applied Physics, University of Calcutta, 3 months *

18. Publication from NISER on HEP detector
Development of a GEM based detector for the CBM Muon Chamber (MUCH) S. Biswas et. al JINST 8 C12002 doi: / /8/12/C12002.
Development of RPC using glued bakelite sheets Viwek Mertiya, Rajesh Ganai, S. Biswas, S. Chattopadhyay, G. Das, C. Marick, S. Saha, and Y. P. Viyogi. Proceedings of the DAE Symposium on Nuclear Physics. Volume 58, (2013),
Performance simulation of a MRPC-based PET Imaging System Arindam Roy, Arnab Banerjee, Saikat Biswas, Subhasis Chattopadhyay, Ganesh Das, Satyajit Saha, 2014 JINST 9 C doi: / /9/10/C10030.
A simple technique for gamma ray and cosmic ray spectroscopy using plastic scintillator. Akhilesh P. Nandan, Sharmili Rudra, Himangshu Neog, M. R. Bhuyan, S. Biswas, S. Mahapatra, B. Mohanty, Rudranarayan Mohanty, Subasha Rout, P. K. Sahu, S. Sahu, V. A. Sakthivel, P. K. Samal [arXiv: ]
Development of Data logger for atmospheric pressure, temperature and relative humidity for gas-filled detector S. Sahu, M. R. Bhuyan, S. Biswas, B. Mohanty, and P. K. Sahu (Accepted in DAE Symposium on Nuclear Physics, 2014)
Fabrication of Resistive Plate Chamber using Bakelite Himangshu Neog, Sharmili Rudra, M. R. Bhuyan, S. Biswas, B. Mohanty, Rudranarayan Mohanty, P. K. Sahu, and S. Sahu (Accepted in DAE Symposium on Nuclear Physics, 2014)
Cosmic ray spectroscopy using plastic scintillator detector Sharmili Rudra, Akhilesh P. Nandan, Himangshu Neog, S. Biswas, S. Mahapatra, B. Mohanty, and P. K. Samal (Accepted in DAE Symposium on Nuclear Physics, 2014) *

19. Future work GEM related activities started
Fabrication and systematic studies of GEM for ALICE TPC up gradation at CERN
We will also get new space exclusively for GEM activity
Long term test of GEM
Measurement of Ageing of GEM and other gas detector
Measure the gain and energy resolution for different configuration
Measure the spark rate and the spark probability
Provision to build gas filled detectors e.g. GEM, RPC, MRPC etc.
To join CBM, INO and other HEP experiments *

20. Advertisement for Post doc at NISER*

21. Thank you *