To further establish GISMO simulation of the FLCD detector (see main page) 5000 single p+ were generated and allowed to shower through the geometry. Previous results indicate an EM resolution between 15 and 19%/ÖE, and a hadronic resolution of ~ 40%/ÖE. Despite what appears to be impossibly good HAD resolution, independent studies suggest GISMO is producing a valid hadron shower.
A subtle high energy tail in earlier data becomes more pronounced in the 4 and 18 GeV plots here. The mean assuming a normal distribution appears biased by this non-Gaussian tail for incident E<10 GeV. For E>10 GeV detector response (<E>) becomes more and more Gaussian and appears slightly less biased (within error of a polynomial approximation of the tail).
NLD resolution can be determined from the data below and suggests a hadronic resolution of ~ 46%/ÖE. The y-intercept of s/<E> vs.1/ÖE is about 5%, a value we expected to find much closer to the origin.
NLD Detector Response
| Incident E | <E> | error | s | error |
| 4 | 2.98 | 0.02 | 0.83 | 0.03 |
| 6 | 4.59 | 0.02 | 1.11 | 0.03 |
| 8 | 6.08 | 0.03 | 1.29 | 0.03 |
| 10 | 7.56 | 0.03 | 1.54 | 0.03 |
| 12 | 9.15 | 0.03 | 1.74 | 0.03 |
| 14 | 10.80 | 0.03 | 1.84 | 0.03 |
| 16 | 12.35 | 0.04 | 2.04 | 0.03 |
| 18 | 13.96 | 0.04 | 2.15 | 0.03 |
Having cross-checked GISMO simulation with SLD GEANT, previous results seem more plausible. We now believe FLCD hadronic resolution comes in around 46%/ÖE.
Chad Colgur Last Modified: 01/13/04 12:55
