J. Ruzicka,
S. Saro,
V. P. Zrelov,
P. V. Zrelov,
E. D. Lapchik,
H. Geissel,
H. Irnich,
C. Kozhuharov,
A. Magel,
G. Münzenberg,
F. Nickel,
C. Scheidenberger,
H. J. Schott,
W. Schwab,
T. Stöhlker,
and B. Voss
Investigation of possible applications of Cherenkov technique to measure average energy of beams of relativistic Au-197(79) nuclei in energy range 0.64-0.99 GeV/u
Nucl. Instr. Meth. A, 369 :23 (January 1996)
Investigation of possible applications of Cherenkov technique to measure average energy of beams of relativistic Au-197(79) nuclei in energy range 0.64-0.99 GeV/u
Nucl. Instr. Meth. A, 369 :23 (January 1996)
Abstract:
A possibility of using the Cherenkov technique to measure the average energy of collimated relativistic nuclear Au-79 beams is investigated in the article for specific beam-radiator interaction (strong deceleration, fragmentation) produces a considerable effect of the spreading of the Cherenkov one. Two Cherenkov methods - achromatic (E, alpha) and combined ("combi")- were employed for this purpose. At an energy about 1 GeV/u the accuracy of measurement by the "combi" method was +/-1.4MeV/u. The accuracy of measurement by the (E,alpha) method was +/-0.9MeV/u at the energy E(Au) approximate to 640MeV/u. These results turned out to be in good agreement with initial E(Au)(0) data from the SIS accelerator with allowances made for energy losses over the beam line (the maximum discrepancy was less than or equal to 0.4%). With all the set of these data, the direction condition was for the first time checked for VChR from heavy nuclei. It is shown to be fulfilled to an accuracy above +/-5' in the angle range 27 degrees < Theta(Ch) < 38.5 degrees.