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Project A.3.3

Fig A.3.4 BRIX schematic layout

BRIX commissioning

The Laser-Driven Compact Bright X-Ray Source (BRIX) is based on a commercial prototype the Compact Light Source (CLS)14 commissioned in 2005. Electrons of 20-44 MeV energy are circulating in a small storage ring and infrared laser pulses are stored in a high-finesse cavity. By colliding both beams head-on, CLS produces X-rays in the range from 7-35 keV via inverse Thomson scattering. Presently the CLS has demonstrated an X-ray brilliance of 2·109ph/sec/mm2/ mrad2/ 0.1%BW. The goal for BRIX is to increase this figure by a factor of 10-100.

To this end, a new enhancement cavity will be developed in A.1.3 to increase the stored laser power from 20 kW to 200-300 kW. Optimised injection and orbit control will raise the bunch charge from 0.3 nC to 1.2 nC and improve the timing jitter between electron and laser beam. BRIX requires exact timing of photon and electron pulses (with 30 ps and 50 ps duration respectively) in an area of 45x45 ym2.

This requires improved beam diagnostics and fast-orbit feedback systems for beam stabilisation, a challenging task for a low-energy electron storage ring without efficient synchrotron radiation cooling. Initial experiments (2012-2014) will use the CLS prototype machine at Palo Alto (USA) until the new CALA building can accommodate the system and commissioning can start in 2014. The upgrade with the MAP enhancement cavity will be performed over 2015-2017.