Imagescope to photodiode beam-profile imaging system

Conference · Mon Aug 01 00:00:00 EDT 1983 · IEEE Trans. Nucl. Sci.; (United States)

OSTI ID:5302325

Chamberlin, D D; Hollabaugh, J S; Stump, Jr, C J

Transverse beam-distribution measurements of high-current cw accelerators must be obtained from noninterceptive sensors. For the 100-mA H/sub 2/ or D beam of the Fusion Materials Irradiation Test (FMIT) accelerator, these transverse properties may be obtained by detecting the visible radiation resulting from beam interactions with residual gas. This report describes a new technique for sensing and digitizing the light projected transversely from the beam of the FMIT accelerator at Los Alamos National Laboratory. An input lens focuses the beam-profile image onto a bundle of optical fibers that are spatially coherent from end to end. The output end gathers the fibers from the four input legs into a small double-row format. Thus, four different beam-profile images are transferred from this fiber-optic bundle (Imagescope) through a microchannel-plate (MCP) image intensifier with a format arranged so that two linear photodiode arrays (Reticons) receive the intensified images. The photodiode arrays have 512 elements each; thus, each beam profile has a 256-element resolution. An electronic package accepts the electric signal from the photodiodes, digitizes the contribution of each sensitive element, and transmits the digitized profile information over a fiber-optic data link to a memory unit accessible by the CAMAC data-acquisition and processing system. Details of this new beam-profile imaging and digitizing system are presented.

• Research Organization: Los Alamos Nat.'l Lab., Los Alamos, NM 87545
• OSTI ID: 5302325
• Report Number(s): CONF-830311-
• Journal Information: IEEE Trans. Nucl. Sci.; (United States), Vol. NS-30:4; Conference: Particle accelerator conference, Santa Fe, NM, USA, 21 Mar 1983
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
BEAM PROFILES
DIGITIZERS
IMAGE PROCESSING
FMIT LINAC
BEAM MONITORS
BEAM MONITORING
CAMAC SYSTEM
DATA ACQUISITION SYSTEMS
DATA TRANSMISSION
LASL
MEASURING METHODS
OPTICAL FIBERS
PHOTODIODES
TRANSVERSE MOMENTUM
VISIBLE RADIATION
ACCELERATORS
COMMUNICATIONS
ELECTROMAGNETIC RADIATION
FIBERS
LINEAR ACCELERATORS
LINEAR MOMENTUM
MEASURING INSTRUMENTS
MONITORING
MONITORS
NATIONAL ORGANIZATIONS
PROCESSING
RADIATIONS
SEMICONDUCTOR DEVICES
SEMICONDUCTOR DIODES
US AEC
US DOE
US ERDA
US ORGANIZATIONS
430200* - Particle Accelerators- Beam Dynamics
Field Calculations
& Ion Optics
430303 - Particle Accelerators- Experimental Facilities & Equipment