Please note the one correction below, in red. Original misprint said
"190 counters". The correct figure is "90 counters" between 9 and 11.7
GeV. -rtj Dear Liping, In our current tagger design, there are two possible ways for you to get what you need.
You should look carefully at the fixed array. A full width of each energy bin of 30 MeV translates into a rms energy resolution of 13 MeV = 1.1e-3 of E0. That is very close to your stated requirement. Richard Jones Gan, Liping wrote: Dear Richard, According to the current beamline specification, the energy resolution in the range of 9-11.7 Gev is 20 MeV, which is about 2x10^-3. Is it possible to improve the resolution to 1x10^-3 in the high energy end, see from 11-11.7 GeV? It would be great help for Primakoff experiment because its cross section has strong energy dependence. I would appreciate very much to hear from you as soon as possible. Best regards, Liping |