title: Measurement of spatial and temporal behavior of H(α) emission from Aditya tokamak using a diagnostic based on a photomultiplier tube array.
abstract: A photo multiplier tube (PMT) array based spectroscopic diagnostic with fast time response of 10 μs and spatial resolution ∼3 cm has been developed and installed on Aditya tokamak to study the spatial and temporal behavior of Hα emissions from typical discharges. Collimated light has been collected from the plasma along 16 lines of sight passing through entire plasma poloidal cross section of Aditya and detected by two 8 channels PMT arrays after selecting Hα emission using interference filter. The studies are carried out during plasma formation phase of Aditya by changing vertical field and its delay with respect to loop voltage. It is observed that plasma initiated in the high field side in typical discharges of Aditya. The plasma formation position is matched with null field location estimated through simulation.
authors.affiliation: Institute for Plasma Research, Bhat, Gandhinagar, Gujarat 382 428, India.
authors.forename: M B
authors.initials: MB
authors.lastname: Chowdhuri
authors.affiliation: Institute for Plasma Research, Bhat, Gandhinagar, Gujarat 382 428, India.
authors.forename: J
authors.initials: J
authors.lastname: Ghosh
authors.affiliation: Institute for Plasma Research, Bhat, Gandhinagar, Gujarat 382 428, India.
authors.forename: R
authors.initials: R
authors.lastname: Manchanda
authors.affiliation: Metallurgical Engineering and Material Science Department, Indian Institute of Technology Bombay, Powai, Mumbai 400 076, India.
authors.forename: Ajay
authors.initials: A
authors.lastname: Kumar
authors.affiliation: Institute for Plasma Research, Bhat, Gandhinagar, Gujarat 382 428, India.
authors.forename: S
authors.initials: S
authors.lastname: Banerjee
authors.affiliation: Institute for Plasma Research, Bhat, Gandhinagar, Gujarat 382 428, India.
authors.forename: N
authors.initials: N
authors.lastname: Ramaiya
authors.affiliation: Institute for Plasma Research, Bhat, Gandhinagar, Gujarat 382 428, India.
authors.forename: Niral
authors.initials: N
authors.lastname: Virani
authors.affiliation: Institute for Plasma Research, Bhat, Gandhinagar, Gujarat 382 428, India.
authors.forename: Aniruddh
authors.initials: A
authors.lastname: Mali
authors.affiliation: Institute for Plasma Research, Bhat, Gandhinagar, Gujarat 382 428, India.
authors.forename: A
authors.initials: A
authors.lastname: Amardas
authors.affiliation: Institute for Plasma Research, Bhat, Gandhinagar, Gujarat 382 428, India.
authors.forename: Pintu
authors.initials: P
authors.lastname: Kumar
authors.affiliation: Institute for Plasma Research, Bhat, Gandhinagar, Gujarat 382 428, India.
authors.forename: R L
authors.initials: RL
authors.lastname: Tanna
authors.affiliation: Institute for Plasma Research, Bhat, Gandhinagar, Gujarat 382 428, India.
authors.forename: C N
authors.initials: CN
authors.lastname: Gupta
authors.affiliation: Institute for Plasma Research, Bhat, Gandhinagar, Gujarat 382 428, India.
authors.forename: S B
authors.initials: SB
authors.lastname: Bhatt
authors.affiliation: Institute for Plasma Research, Bhat, Gandhinagar, Gujarat 382 428, India.
authors.forename: P K
authors.initials: PK
authors.lastname: Chattopadhyay