Abstract
The storage ring PIA, designed to produce intensive single 500 MHz positron bunches, was installed last year. In June positrons were accumulated and compressed in a single bunch of 1 ns length for the first time. The accumulation efficiency was raised up to 56% by matching the linac beam to the PIA optics and by compensating the sextupole components in the bending magnets by additional sextupoles. Since July 1979 PIA has been running routinely for PETRA and DORIS:
The linac (50 Hz, 450 MeV) delivers 9 bursts (100 ns, 2 Ù 109 positrons each), which are accumulated and damped to a bunch length of 80 cm by a 10.4 MHz cavity. Then the bunch is compressed to 25 cm length by a 125 MHz rf system in 60 ms and then ejected.
Up to 1010 positrons were accumulated in a circulating bunch. The ejection efficiency is 90%, the repetition rate of PIA 4 Hz.
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References
A. Febel, G. Hemrnie, G. Mühlhaupt, K. Wille “PETRA INJECTION SYSTEM”, Proceedings of the Xth International Conference on High Energy Accelerators, Protvino, July 1977, Vol 1, p. 464
A. Febel, G. Hemmie, G. Mühlhaupt “Auslegung des Zwischenspeichers für die Positroneninjektion nach PETRA”, Technical Note DESY-PET 77/29
A. Febel, G. Hemmie, “PIA, the Positron Intensity Accumulator for the PETRA Injection”, IEEE Trans., June 1979, Vol. NS-26, No. 3, p. 3244
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© 1980 Springer Basel AG
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Febel, A., Hemmie, G. (1980). Status and Performance of PIA. In: Newman, W.S. (eds) 11th International Conference on High-Energy Accelerators. Experientia Supplementum, vol 40. Birkhäuser, Basel. https://doi.org/10.1007/978-3-0348-5540-2_6
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DOI: https://doi.org/10.1007/978-3-0348-5540-2_6
Publisher Name: Birkhäuser, Basel
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