light sources 141
The Compton sources based on a linac, mentioned above,
require superconducting RF (SRF) technology to achieve
maximal brightness. Compton sources are compact and
therefore may be suitable for small organizations, labs, hospitals or universities. However, most of the modern SRF cavities
with frequencies around 1 GHz require operation at 2 K temperature. There is, nonetheless, a contradiction here as the
cryogenics system, in particular for 2 K, can be bulky and expensive.
A possible solution for this issue is to revert to lower frequency SRF cavities, which operate at 4 K temperatures, resulting in a significant reduction in complexity, size and cost
of the cryogenic system. The practical frequency range of SRF
cavities that work at 4 K is around 200-500 MHz. The larger
transverse size and lower accelerating gradient of the lower
frequency cavities can sometimes be compensated by modifying their design, e.g., use of spoke cavities.
The Compton sources based on a linac, mentioned above,
require superconducting RF (SRF) technology to achieve
maximal brightness. Compton sources are compact and
therefore may be suitable for small organizations, labs, hospitals or universities. However, most of the modern SRF cavities
with frequencies around 1 GHz require operation at 2 K temperature. There is, nonetheless, a contradiction here as the
cryogenics system, in particular for 2 K, can be bulky and expensive.
A possible solution for this issue is to revert to lower frequency SRF cavities, which operate at 4 K temperatures, resulting in a significant reduction in complexity, size and cost
of the cryogenic system. The practical frequency range of SRF
cavities that work at 4 K is around 200-500 MHz. The larger
transverse size and lower accelerating gradient of the lower
frequency cavities can sometimes be compensated by modifying their design, e.g., use of spoke cavities.