1. Radiation Requirements for the AO Response
Jan E. S. Bergman Swedish Institute of Space Physics, Uppsala, Sweden
RPWI Team Meeting
Uppsala, May 9-11, 2012

2. JUICE Radiation Environment
Similar to the GEO environment
electron dominated
More severe
higher density and higher energies
Risk is considered high
Risk mitigation
shielding strategies similar to GEO/MEO missions
New JOREM model
TID increased by a factor of 2 compared to previous estimates
Europa flyby’s add 25%
Callisto fly-by’s add 9 %
Parts requirement: 240 kRad behind 10 mm Aluminum
JUICE/Laplace Reformulation Review - Part A Date 18/12/2011 Issue 2 Rev 3

3. Radiation Mitigation Strategy
Establish tailored JUICE Radiation Hardness Assurance requirements
Implement iterative shielding analysis and shielding configuration control during the early design phases
The planned TDA’s for characterization and screening of parts shall be pursued with high priority
A European radiation-tolerant Approved Parts and Materials List (APML) shall be established
Requires early availability of detailed design models suitable for radiation shielding analysis
spacecraft
platform equipment
Instruments
Assess consequence of excessive spot shielding
Increased mechanical and thermal loads on the components and PCB’s
JUICE/Laplace Reformulation Review - Part A Date 18/12/2011 Issue 2 Rev 3

4. Consequences for RPWI
The radiation effects on RPWI must be modeled and analyzed in detail
Radiation analyses on CAD models in AO response
We must show ESA that RPWI is fully compliant with the radiation requirements!