Diamond Light Source Image of the Week

Photo
31 August 2011: As the electrons circulate around the storage ring they pass through a cavity containing electromagnetic fields oscillating at radio frequencies (RF). This provides an energy boost which compensates for the energy (light) losses. The pressure gauge pictured is showing that the pressure of the helium can on this storage ring RF cavity is 0.2 bar over atmosphere (0.2 barG) or 1.2 barA or 1200 mb. The helium can sits around the outside of the cavity cell and keeps it at 4.2 K, so that stays superconducting. The helium boils off with the beam heating and with outside heat leaks. The gas is sent back to the helium plant in a controlled manner to keep the cavity cell at a constant pressure. Photo by Bill Nicholls, Vacuum Technician.

31 August 2011: As the electrons circulate around the storage ring they pass through a cavity containing electromagnetic fields oscillating at radio frequencies (RF). This provides an energy boost which compensates for the energy (light) losses. The pressure gauge pictured is showing that the pressure of the helium can on this storage ring RF cavity is 0.2 bar over atmosphere (0.2 barG) or 1.2 barA or 1200 mb. The helium can sits around the outside of the cavity cell and keeps it at 4.2 K, so that stays superconducting. The helium boils off with the beam heating and with outside heat leaks. The gas is sent back to the helium plant in a controlled manner to keep the cavity cell at a constant pressure. Photo by Bill Nicholls, Vacuum Technician.


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