Title :
Energy and energy width measurement in the FNAL antiproton accumulator
Author :
Church, M. ; Hsueh, S.Y. ; Rapidis, P.A. ; Werkema, S.
Author_Institution :
Fermi Nat. Accel. Lab., Batavia, IL, USA
Abstract :
The Fermilab Antiproton Accumulator has been used to produce charmonium resonances (charm quark, anti-charm quark bound states) in proton-antiproton annihilations using an internal H/sub 2/ gas jet target. A measurement of the resonance mass and width may be obtained from a precise knowledge of the antiproton beam energy and energy spread. The beam energy is measured to an accuracy of one part in 10/sup 4/ in the range 6.3 GeV to 4.1 GeV by measuring the orbit length and resolution frequency of the beam. The beam momentum spread is measured to an accuracy of 10%. The two measurement techniques used are described.<>
Keywords :
particle beam diagnostics; proton accelerators; storage rings; 4.1 to 6.3 GeV; FNAL antiproton accumulator; Fermilab Antiproton Accumulator; antiproton; beam energy; beam momentum spread; energy width; orbit length; resolution frequency; Current measurement; Energy measurement; Extraterrestrial measurements; Frequency measurement; Length measurement; Magnetic field measurement; Proton accelerators; Resonance; Signal analysis; Uncertainty;
Conference_Titel :
Particle Accelerator Conference, 1991. Accelerator Science and Technology., Conference Record of the 1991 IEEE
Conference_Location :
San Francisco, CA, USA
Print_ISBN :
0-7803-0135-8
DOI :
10.1109/PAC.1991.164216
