Nuclear Reaction Studies Using CARME@CRYRINGHYBRID

Storage rings provide a new and unique opportunity to resolve long standing problems in astrophysics by performing nuclear reactions using stored heavy ion beams on an ultra-thin internal gas-jet target. The CRYRING storage ring, part of FAIR phase-0, is unique worldwide by allowing ion beams to be decelerated, cooled and circulated at energies of astrophysical interest. The CRYRING Array for Reaction MEasurements (CARME) array utilises this novel methodology to study direct nuclear reactions at stellar energies in addition to indirect studies of key nuclear properties with consequences for quiescent and explosive astrophysical environments. CARME utilises high resolution (~30 keV FWHM), highly segmented (128x128 strip) Double-Sided Silicon Strip Detectors (DSSSD) installed directly under extreme high vacuum (10-12 mbar) with no pockets or windows. The detectors are capable of movement, which is required to avoid the un-cooled beam when it is first injected into the storage ring. CARME was installed in September 2021 and demonstrated that the XHV pressures required for circulation of beam around the ring, could be achieved with detectors and the accompanying electrical cabling installed under vacuum. CARME was successfully commissioned with a deuteron beam incident on a nitrogen gas target in February 2022. I will present the technical capabilities of the CARME array and results of the first commissioning beam-time. This was the first use of the internal gas target, and the first observation of nuclear reactions at the CRYRING, and acts as a launch pad for the exciting physics programme ahead. 

https://gsi-fair.zoom.us/j/63856816325
Meeting-ID: 638 5681 6325
Passcode: AP_Seminar
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