title: Investigating fusion plasma instabilities in the Mega Amp Spherical Tokamak using mega electron volt proton emissions (invited).
abstract: The proton detector (PD) measures 3 MeV proton yield distributions from deuterium-deuterium fusion reactions within the Mega Amp Spherical Tokamak (MAST). The PD's compact four-channel system of collimated and individually oriented silicon detectors probes different regions of the plasma, detecting protons (with gyro radii large enough to be unconfined) leaving the plasma on curved trajectories during neutral beam injection. From first PD data obtained during plasma operation in 2013, proton production rates (up to several hundred kHz and 1 ms time resolution) during sawtooth events were compared to the corresponding MAST neutron camera data. Fitted proton emission profiles in the poloidal plane demonstrate the capabilities of this new system.
authors.affiliation: Department of Physics, Florida International University, 11200 SW 8 ST, CP204, Miami, Florida 33199, USA.
authors.forename: R V
authors.initials: RV
authors.lastname: Perez
authors.affiliation: Department of Physics, Florida International University, 11200 SW 8 ST, CP204, Miami, Florida 33199, USA.
authors.forename: W U
authors.initials: WU
authors.lastname: Boeglin
authors.affiliation: Princeton Plasma Physics Laboratory, James Forrestal Campus, P.O. Box 451, Princeton, New Jersey 08543, USA.
authors.forename: D S
authors.initials: DS
authors.lastname: Darrow
authors.affiliation: Department of Physics and Astronomy, Uppsala University, Uppsala SE-751 20, Sweden.
authors.forename: M
authors.initials: M
authors.lastname: Cecconello
authors.affiliation: Department of Physics and Astronomy, Uppsala University, Uppsala SE-751 20, Sweden.
authors.forename: I
authors.initials: I
authors.lastname: Klimek
authors.affiliation: CCFE, Culham Science Centre, Abingdon, Oxfordshire OX14 3DB, United Kingdom.
authors.forename: S Y
authors.initials: SY
authors.lastname: Allan
authors.affiliation: CCFE, Culham Science Centre, Abingdon, Oxfordshire OX14 3DB, United Kingdom.
authors.forename: R J
authors.initials: RJ
authors.lastname: Akers
authors.affiliation: CCFE, Culham Science Centre, Abingdon, Oxfordshire OX14 3DB, United Kingdom.
authors.forename: D L
authors.initials: DL
authors.lastname: Keeling
authors.affiliation: CCFE, Culham Science Centre, Abingdon, Oxfordshire OX14 3DB, United Kingdom.
authors.forename: K G
authors.initials: KG
authors.lastname: McClements
authors.affiliation: CCFE, Culham Science Centre, Abingdon, Oxfordshire OX14 3DB, United Kingdom.
authors.forename: R
authors.initials: R
authors.lastname: Scannell
authors.affiliation: ITER Physics Department, EFDA CSU Garching, Boltzmannstrasse 2, D-85748, Garching, Germany.
authors.forename: M
authors.initials: M
authors.lastname: Turnyanskiy
authors.affiliation: Department of Physics, Florida International University, 11200 SW 8 ST, CP204, Miami, Florida 33199, USA.
authors.forename: A
authors.initials: A
authors.lastname: Angulo
authors.affiliation: Department of Physics, Florida International University, 11200 SW 8 ST, CP204, Miami, Florida 33199, USA.
authors.forename: P
authors.initials: P
authors.lastname: Avila
authors.affiliation: Department of Physics, Florida International University, 11200 SW 8 ST, CP204, Miami, Florida 33199, USA.
authors.forename: O
authors.initials: O
authors.lastname: Leon
authors.affiliation: Department of Physics, Florida International University, 11200 SW 8 ST, CP204, Miami, Florida 33199, USA.
authors.forename: C
authors.initials: C
authors.lastname: Lopez
authors.affiliation: CCFE, Culham Science Centre, Abingdon, Oxfordshire OX14 3DB, United Kingdom.
authors.forename: O M
authors.initials: OM
authors.lastname: Jones
authors.affiliation: CCFE, Culham Science Centre, Abingdon, Oxfordshire OX14 3DB, United Kingdom.
authors.forename: N J
authors.initials: NJ
authors.lastname: Conway
authors.affiliation: Australian National University, Canberra ACT 0200, Australia.
authors.forename: C A
authors.initials: CA
authors.lastname: Michael