Diagnostics for the APS undulator test line
One of the research and development thrusts at the Advanced Photon Source (APS) is to use an rf gun as a low-emittance electron source for injection into the 100- to 650-MeV linac subsystem and subsequent transport to an undulator test area. This configuration would combine the acceleration capability of the 200-MeV S-band electron linac and the in-line 450-MeV positron linac that normally provide positrons to the positron accumulator ring (PAR). A transport line that bypasses the PAR will bring the electrons to the undulator test area. Characterization techniques will be discussed for the electron beam with a normalized, rms emittance of <10 {pi} mm mrad (l{sigma}) at micropulse charges of up to 350 pC and micropulse durations of {approximately}5 ps (FWHM). Preservation of such beam properties will be critical. The diagnostics planned, with resolutions in parentheses, include the beam position monitors based on stripline pickups (100 {mu}m), current monitors based on a transformer (60 {mu}A), beam profile monitors (25 {mu}m FWHM), and bunch length monitor based on a streak camera (2 ps). Tests proposed include measurement of particle beam transport effects (at one-tenth the storage ring beam rigidity) caused by small undulator field errors.
- Research Organization:
- Argonne National Lab., IL (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- W-31109-ENG-38
- OSTI ID:
- 10105086
- Report Number(s):
- ANL/ASD/CP--80715; CONF-9310204--9; ON: DE94002911
- Country of Publication:
- United States
- Language:
- English
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