title: A photodiode-based neutral particle bolometer for characterizing charge-exchanged fast-ion behavior.
abstract: A neutral particle bolometer (NPB) has been designed and implemented on Tri Alpha Energy's C-2 device in order to spatially and temporally resolve the charge-exchange losses of fast-ion populations originating from neutral beam injection into field-reversed configuration plasmas. This instrument employs a silicon photodiode as the detection device with an integrated tungsten filter coating to reduce sensitivity to light radiation. Here we discuss the technical aspects and calibration of the NPB, and report typical NPB measurement results of wall recycling effects on fast-ion losses.
authors.affiliation: Tri Alpha Energy, Inc., Rancho Santa Margarita, California 92688, USA. rclary@trialphaenergy.com
authors.forename: R
authors.initials: R
authors.lastname: Clary
authors.forename: A
authors.initials: A
authors.lastname: Smirnov
authors.forename: S
authors.initials: S
authors.lastname: Dettrick
authors.forename: K
authors.initials: K
authors.lastname: Knapp
authors.forename: S
authors.initials: S
authors.lastname: Korepanov
authors.forename: E
authors.initials: E
authors.lastname: Ruskov
authors.forename: W W
authors.initials: WW
authors.lastname: Heidbrink
authors.forename: Y
authors.initials: Y
authors.lastname: Zhu