Design of Vacuum Chambers Downstream of NSLS X-Ray Ring Insertion Devices

摘要

In an electron storage ring, the maximum power deposited in the vacuum chamber walls is that produced by the electron beam as it is accelerated through the bending magnets. In the NSLS x-ray ring, this power is 58 watts per linear cm of arc chamber length, or 2 kw/cm sup 2, taking into account the beam size. Standard water cooling techniques are adequate to protect the chambers from overheating under this range of power density. However, with the installation of wigglers and undulators, cooling of the chambers is no longer a trivial matter. Without proper interlocks and cooling, beams from these insertion devices can easily do permanent thermal damage to the chamber walls. As part of the NSLS Phase II project, three insertion devices are planned for the beamlines X-1, X-17 and X-25, namely, a soft x-ray undulator, a superconducting wiggler and a hybrid wiggler. The effect of these insertion devices on the design of vacuum chambers downstream of these devices is the subject of this paper. 4 refs., 3 figs., 1 tab. (ERA citation 13:054676)