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1.
Development of indigenous silicon detector and readout electronics for forward electromagnetic calorimeter prototypes / Mukhopadhyay, Sourav (HBNI, Mumbai) ; Chandratre, V B (HBNI, Mumbai) ; Sukhwani, Menka (HBNI, Mumbai) ; Singaraju, Rama N (Calcutta, VECC) ; Muhuri, Sanjib (Calcutta, VECC ; HBNI, Mumbai) ; Saini, Jogender (Calcutta, VECC) ; Khan, Shuaib A (Calcutta, VECC) ; Nayak, Tapan (Calcutta, VECC ; NISER, Jatni ; CERN)
ALICE is a high-energy physics experiment at the CERN Large Hadron Collider (LHC) in Geneva, to study the properties of quark-gluon plasma, formed in heavy-ion collisions. In the upgrade program, a new electromagnetic forward calorimeter (FOCAL) based on silicon and tungsten (Si$+$W) sampling configuration, has been proposed to address new physics objectives of ALICE experiment. [...]
2022 - 12 p. - Published in : Pramana - J. Phys. 96 (2022) 177
2.
ANUINDRA: A wide dynamic range FEE ASIC for a silicon–tungsten electromagnetic calorimeter / Mukhopadhyay, Sourav (Bhabha Atomic Res. Ctr. ; HBNI, Mumbai) ; Chandratre, Vinay B (Bhabha Atomic Res. Ctr. ; HBNI, Mumbai) ; Muhuri, Sanjib (Calcutta, VECC ; HBNI, Mumbai) ; Singaraju, Rama N (Calcutta, VECC) ; Saini, Jogender (Calcutta, VECC) ; Nayak, Tapan K (Calcutta, VECC ; NISER, Jatni ; CERN)
A wide dynamic range (ratio of maximum detectable signal to noise floor) front end electronics (FEE) readout ASIC ANUINDRA has been developed in 0.35μm standard N-well CMOS technology for the prototype forward calorimeter (FOCAL), a silicon–tungsten (Si–W) electromagnetic (EM) calorimeter, proposed as part of the ALICE upgrade at CERN. It is a 16 channel pulse processing ASIC with a multiplexed serial output along with all the individual channel’s responses available as output pins. [...]
2022 - 8 p. - Published in : Nucl. Instrum. Methods Phys. Res., A 1040 (2022) 167253
3.
Prototype Test for Electromagnetic Calorimeter, FOCAL, at CERN-SPS Using Large Dynamic Range Readout Electronics / Muhuri, Sanjib (Calcutta, VECC) ; Chandra, Sinjini (Calcutta, VECC ; HBNI, Mumbai) ; Mukhopadhyay, Sourav (Bhabha Atomic Res. Ctr.) ; Saini, Jogender (Calcutta, VECC) ; Chandratre, V B (Bhabha Atomic Res. Ctr.) ; Singaraju, R N (Calcutta, VECC) ; Nayak, T K (Calcutta, VECC ; CERN) ; van den Brink, Ton (Utrecht U.) ; Chattopadhyay, Subhasis (Calcutta, VECC)
A silicon–tungsten prototype calorimeter, for the proposed ALICE LS3-upgarde, was fabricated and tested at the CERN-SPS beamline facility in the year 2017. The calorimeter was designed with the help of GEANT4 simulation to perform in a high multiplicity density environment with optimised energy and position resolutions for incident energy up to 200 GeV. [...]
Singapore : Springer, 2021 - 7 p. - Published in : Springer Proc. Phys. 261 (2021) 833-839
In : 23rd DAE-BRNS High Energy Physics Symposium, Chennai, India, 10-14 Dec 2018, pp.833-839
4.
A wide swing charge sensitive amplifier for a prototype Si–W EM calorimeter / Mukhopadhyay, Sourav (Bhabha Atomic Res. Ctr. ; HBNI, Mumbai) ; Chandratre, Vinay B. (Bhabha Atomic Res. Ctr. ; HBNI, Mumbai) ; Muhuri, Sanjib (Calcutta, VECC ; HBNI, Mumbai) ; Singaraju, Rama N. (Calcutta, VECC) ; Saini, Jogender (Calcutta, VECC) ; Nayak, Tapan K. (Calcutta, VECC ; NISER, Jatni ; CERN)
A wide swing charge sensitive amplifier (CSA) has been developed, as a part of a front-end electronics (FEE) readout ASIC, for a prototype silicon tungsten (Si-W) based electromagnetic (EM) calorimeter. The CSA, designed in 0.35 $\mu$m N-well CMOS technology using 5V MOS transistors, has a wide linear operating range of 2.6 pC w.r.t the input charge with a power dissipation of 2.3 mW. [...]
arXiv:2201.07410.- 2022-04-01 - 8 p. - Published in : Nucl. Instrum. Methods Phys. Res., A 1028 (2022) 166367 Fulltext: PDF;
5.
Development and characterization of a large area silicon pad array for an electromagnetic calorimeter / Mukhopadhyay, Sourav (Bhabha Atomic Res. Ctr. ; HBNI, Mumbai) ; Chandratre, Vinay B. (Bhabha Atomic Res. Ctr. ; HBNI, Mumbai) ; Muhuri, Sanjib (Calcutta, VECC ; HBNI, Mumbai) ; Singaraju, Rama N. (Calcutta, VECC) ; Saini, Jogender (Calcutta, VECC) ; Nayak, Tapan K. (Calcutta, VECC ; Bhubaneswar, NISER ; CERN)
We present the research and development work of the first version of a 6*6 array of silicon pad detectors, carried out in India, for the proposed forward calorimeter (FOCAL) as part of the ALICE collaboration upgrade program at CERN. The primary motivation is to develop a large area silicon pad array realizing the challenging requirements of high-energy physics experiments such as low leakage current, high breakdown voltage and evaluate its performance as an active layer in the prototype silicon tungsten (Si-W) electromagnetic (EM) calorimeter. [...]
arXiv:2109.15260.- 2021-09-22 - 15 p. - Published in : JINST 16 (2021) P09026 Fulltext: document - PDF; 2109.15260 - PDF;
6.
Characteristic study of a quadruple GEM detector in different electric field configurations / Patra, Rajendra Nath (Calcutta, VECC ; Darmstadt, GSI) ; Singaraju, Rama Narayan (Calcutta, VECC) ; Dalal, Somnath (Calcutta, VECC) ; Biswas, Saikat (Bose Inst., Kolkata) ; Viyogi, Yogendra P (Calcutta, VECC) ; Nayak, Tapan K (Calcutta, VECC ; CERN)
A quadruple GEM detector has been assembled and operated using Ar/CO$_2$ 90:10 and 70:30 gas mixtures. Detailed study of the effective gain and energy resolution of the detector are performed using the X-ray spectrum of $^{55}$Fe source. [...]
Elsevier, 2019 - 3 p. - Published in : Nucl. Instrum. Methods Phys. Res., A 936 (2019) 433-435
In : Frontier Detectors for Frontier Physics: XIV Pisa Meeting on Advanced Detectors, La Biodola, Isola D'elba, Italy, 27 May - 2 Jun 2018, pp.433-435
7.
Fabrication and beam test of a silicon-tungsten electromagnetic calorimeter / Muhuri, Sanjib (Calcutta, VECC) ; Mukhopadhyay, Sourav (HBNI, Mumbai) ; Chandratre, Vinay B. (HBNI, Mumbai) ; Nayak, Tapan K. (Calcutta, VECC ; CERN) ; Saha, Sumit Kumar (Calcutta, VECC) ; Thakur, Sanchari (Calcutta, VECC) ; Singaraju, Rama N. (Calcutta, VECC) ; Saini, Jogender (Calcutta, VECC) ; van den Brink, A. (Utrecht U. ; Nikhef, Amsterdam ; Utrecht U.) ; Chujo, Tatsuya (Tsukuba U. (main)) et al.
A silicon-tungsten (Si-W) sampling calorimeter, consisting of 19 alternate layers of silicon pad detectors (individual pad area of 1~cm$^2$) and tungsten absorbers (each of one radiation length), has been constructed for measurement of electromagnetic showers over a large energy range. The signal from each of the silicon pads is readout using an ASIC with a dynamic range from $-300$~fC to $+500$~fC. [...]
arXiv:1911.00743.- 2020-03-18 - 15 p. - Published in : JINST 15 (2020) P03015 Fulltext: PDF; Fulltext from publisher: PDF;
8.
Test of prototype electromagnetic calorimeter (FOCAL) using large dynamic range ASIC ANUINDRA at CERN-SPS / Muhuri, Sanjib (Calcutta, VECC) ; Chandra, Sinjini (Calcutta, VECC) ; Mukhopadhyay, Sourav (Bhabha Atomic Res. Ctr.) ; Saini, Jogender (Calcutta, VECC) ; Chandratre, V B (Bhabha Atomic Res. Ctr.) ; Singaraju, R N (Calcutta, VECC) ; Nayak, T K (Calcutta, VECC ; CERN) ; van den Brink, Ton (Utrecht U.) ; Chattopadhyay, S (Calcutta, VECC)
2017 - 2 p. - Published in : DAE Symp. Nucl. Phys.: 62 (2017) , pp. 872-873 Fulltext: PDF;
In : 62nd DAE-BRNS Symposium on Nuclear Physics, Patiala, India, 20 - 24 Dec 2017, pp.872-873
9.
Study of a Triple GEM Detector Operated with Different Argon Based Gas / Patra, Rajendra Nath (Calcutta, VECC) ; Singaraju, R N (Calcutta, VECC) ; Biswas, S (CAPSS, Kolkata) ; Ahammed, Z (Calcutta, VECC) ; Nayak, T K (Calcutta, VECC ; CERN) ; Viyogi, Y P (Calcutta, VECC)
A triple GEM detector of size 10 $\times $ 10 cm$^{2}$ has been operated using a Ar:CO$_{2}$ (90:10) gas mixture. The detector efficiency has been measured with$^{106}$ Ru-Rh $\beta $ -source. [...]
2018 - 3 p. - Published in : Springer Proc. Phys. 203 (2018) 821-823
In : 22nd DAE-BRNS High Energy Physics Symposium, Delhi, India, 12 -16 Dec 2016, pp.821-823
10.
Study of J/$\psi$ azimuthal anisotropy at forward rapidity in Pb-Pb collisions at $\sqrt{s_{\rm NN}}$ = 5.02 TeV / ALICE Collaboration
The second ($v_2$) and third ($v_3$) flow harmonic coefficients of J/$\psi$ mesons are measured at forward rapidity (2.5 $<$ $y$ $<$ 4.0) in Pb-Pb collisions at $\sqrt{s_{\rm NN}}$ = 5.02 TeV with the ALICE detector at the LHC. Results are obtained with the scalar product method and reported as a function of transverse momentum, $p_{\rm{T}}$, for various collision centralities. [...]
arXiv:1811.12727; CERN-EP-2018-319.- Geneva : CERN, 2019-02-04 - 26 p. - Published in : JHEP 02 (2019) 012 Article from SCOAP3: PDF; Draft (restricted): PDF; Fulltext: PDF;

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13 Singaraju, R
119 Singaraju, R N
1 Singaraju, R.N
3 Singaraju, R.N.
2 Singaraju, Rama N
4 Singaraju, Rama N.
2 Singaraju, Rama Narayan
217 Singaraju, Rama Narayana
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