Gamma-Ray Imager/ Gamma-Ray Imager/

Gamma-Ray Imager/ - PowerPoint Presentation

celsa-spraggs . @celsa-spraggs
Uploaded On 2016-04-30

Gamma-Ray Imager/ - PPT Presentation

Polarimeter for Solar flares GRIPS Recently funded NASA LCAS balloon mission 3D positionsensitive germanium spectrometer High spectral resolution 2 keV FWHM at 662 keV Comptonscatter track reconstruction ID: 299846

ray gamma polarimeter kev gamma ray kev polarimeter grips components 662 fwhm resolution rotating




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Gamma-Ray Imager/Polarimeter for Solar flares (GRIPS)

Recently funded NASA LCAS balloon mission3D position-sensitive germanium spectrometerHigh spectral resolution (~2 keV FWHM at 662 keV)Compton-scatter track reconstructionUses a rotating grid to selectively mask off the Sun to produce gamma-ray imagesWill resolve gamma-ray footpoints in many flaresMeasures gamma-ray polarization “for free”Proves technologies for a future space missionSlide2

GRIPS components

Multi-pitch rotating modulator (MPRM),

2-cm thick tungsten


>200 cm


of geometric area

Energy range

~20 keV

to >~10 MeV

Spectral resolution

~2 keV FWHM at 662 keV

Boom length8 mAngular resolution12.5 to 162 arcsec

Other components include:Cryostat/cryocoolerElectronics, with ASICsAnti-coincidence BGO shieldSolar aspect system

Con-US test flight: spring 2012