V D Srivastava
Articles written in Pramana – Journal of Physics
Volume 63 Issue 2 August 2004 pp 459-463
Instrumentation for PSD-based neutron diffractometers at Dhruva reactor
S S Pande S P Borkar S Prafulla V D Srivastava A Behare P K Mukhopadhyay M D Ghodgaonkar S K Kataria
Linear position sensitive detectors (PSDs) are widely used to configure neutron diffractometers and other instruments. Necessary front-end electronics and a data acquisition system [1] is developed to cater to such instruments built around the Dhruva research reactor in BARC. These include three diffractometers with multiple PSDs and four with single PSD. The front-end electronics consists of high voltage units, preamplifiers [2],shaping amplifiers, ratio ADCs (RDC) [3]. The data acquisition system consists of an interface card and software. Commercially available hardware like temperature controller or stepper motor controller connected over GPIB or RS232 are also integrated in the data acquisition system. The data acquisition is automated so that it can continue unattended for control parameter like temperature, thus enabling optimum utilization of available beam time. The instrumentation is scalable and can be easily configured for various instrumental requirements. The front-end electronics and the data acquisition system are described here.
Volume 65 Issue 2 August 2005 pp 259-272
Role of guard rings in improving the performance of silicon detectors
Vijay Mishra V D Srivastava S K Kataria
BARC has developed large-area silicon detectors in collaboration with BEL to be used in the pre-shower detector of the CMS experiment at CERN. The use of floating guard rings (FGR) in improving breakdown voltage and reducing leakage current of silicon detectors is well-known. In the present work, it has been demonstrated that FGRs can also be used to improve the spectroscopic response of silicon detectors. The results have been confirmed by carrying out
Volume 96, 2022
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