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CRaTER Data Products & Production Pipeline. Larry Kepko Boston University Center for Space Physics CRaTER PDR. Calibration. By exposing the detectors to beams of known energies, we can determine the response. Current From Detector. Energy of Incident Particle. Calibration. - PowerPoint PPT Presentation
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Cosmic RAy Telescope for the Effects of Radiation
CRaTER Data Products&
Production Pipeline
Larry KepkoBoston University Center for Space Physics
CRaTER PDR
Cosmic RAy Telescope for the Effects of Radiation
Calibrationo By exposing the detectors to beams of known
energies, we can determine the response.C
urr
en
t Fr
om
D
ete
ctor
Energy of Incident Particle
Cosmic RAy Telescope for the Effects of Radiation
Calibrationo We will calibrate the detectors at 3 different
beam facilities, each with different energy ranges and species.• Timetable TBD
o Spot-checking
Cosmic RAy Telescope for the Effects of Radiation
Calibrationo 88” Cyclotron, Lawrence Berkeley National
Laboratory
Facility Beam Properties
LIIF 9-55 MeV H
19 or 32.5 MeV/nucleon He to Ne
HIIF 4.5 MeV/nucleon He to Bi
10 MeV/nucleon B to Xe
14.5-16 MeV/nucleon C to Xe
Cosmic RAy Telescope for the Effects of Radiation
Calibrationo NASA Space Radiation Laboratory at
Brookhaven National Laboratory
Facility Beam Properties
Booster up to 1 GeV H
Booster up to 1 GeV/nucleon Fe
Cosmic RAy Telescope for the Effects of Radiation
Calibrationo Indiana University
Facility Beam Properties
IUCF 30 - 200 MeV H
Cosmic RAy Telescope for the Effects of Radiation
CRaTER Data Products
Description
Level 0 Unprocessed instrument data (pulse height at each detector), secondary science (discarded events), housekeeping.
Level 1Science data depacketed, 1-s resolution. Ancillary data pulled in (spacecraft attitude, calibration files, etc)
Level 2Pulse heights converted into energy deposited in each detector. Calculation of Si LET spectra.
Level 3 Separate out magnetotail, foreshock and ‘GCR’ data.
Level 4Calculation of TEP LET, incident energies and particle flux. Pull in GCR data from other spacecraft (e.g. ACE).
Cosmic RAy Telescope for the Effects of Radiation
Level 0
To Level 1 Processing
LRO MOC
Housekeeping
Primary/secondary
science
sFTPCRaTER SOC
ValidationPDS L0 Archive
Cosmic RAy Telescope for the Effects of Radiation
Level 0 Data Products
Level 0 Science
Unprocessed instrument data (pulse height at each detector), secondary science (discarded events, etc.). Up to 25 packets of up to 48 events per second
Level 0 Housekeeping
Bias voltage, temperature, etc., 16-s resolution
Cosmic RAy Telescope for the Effects of Radiation
Level 1
To Level 2 Processing
LRO MOC
Calibration Files
Orbit & AttitudesFTP
Depacket, create 1-s data
PDS L1 Archive
CRaTER SOC
Cosmic RAy Telescope for the Effects of Radiation
Level 1 Data Products
Level 1 Science
Unprocessed instrument data (pulse height at each detector), depacketed. Creation of 1-s data. Secondary science placed in 1-s data header.
Level 1 Housekeeping
Bias voltage, temperature, etc., 16-s resolution
Cosmic RAy Telescope for the Effects of Radiation
Level 2
To Level 3 Processing
Convert to energy
deposited
PDS L2 Archive
Calculate Si LET
Events of Interest
QL Plots
Cosmic RAy Telescope for the Effects of Radiation
Level 2 Data Products
Level 2 Science
Energy deposited in each detector and LET.
QL Plots TBD
Events of Interest
e.g., SEP events.
Cosmic RAy Telescope for the Effects of Radiation
Level 3
To Level 4 Processing
Region Separation
GCR
Foreshock
Magnetotail
SEP Events
Cosmic RAy Telescope for the Effects of Radiation
Level 3 Data Products
L3 Region
Data separated into 3 files (or, alternately, 1 file with a data flag) identifying what data was obtained while the moon was in the a) magnetosphere, b) foreshock and c) pure GCR
L3 SEPData containing SEP events (definition TBD) are separated as well
Cosmic RAy Telescope for the Effects of Radiation
Level 4
Calculate LET in TEP
Modeling Community
?
Calculate Particle Flux
GCR Spectrum
Cosmic RAy Telescope for the Effects of Radiation
Timetableso Level 2 data produced immediately upon
verification of Level 1 data.• Only involves application of pre-flight calibration curves and
simple LET calculations.
o GCR LET spectrum requires time• The longer the better• Probably something useful after 3-6 months
Cosmic RAy Telescope for the Effects of Radiation
Back-up Slides
Cosmic RAy Telescope for the Effects of Radiation
LET Calculation
Linear Energy Transfer (LET) is the energy deposition in matter per unit length
Cosmic RAy Telescope for the Effects of Radiation
LET Calculation
LET in the Silicon detectors can be calculated directly
Cosmic RAy Telescope for the Effects of Radiation
LET Calculation
LET in the TEP requires E0 and Ef
E0
Ef