1. OD Calorimetry Study Jaewon Park University of Rochester MINERvA/Jupiter Group Meeting, Mar 8, 2006

2. Bethe-Bloch formula (Energy loss of charged particles)  dE/dx is assumed constant in the calculation.  In actual case, it’ll be one source of nonlinearity  Different particle has different dE/dx. In particle shower it’ll combination of them.

3. Total Energy Loss Calculation particle ironscint

4. Energy loss in each layer particle IDECALHCAL PbFe n: layer number (n=0,...,4)

5. Energy resolution E (true) E (measured)

6. E_measured vs. E_true

7. E_measured vs. E_true (1 OD layer)

8. Energy resolution  Measured energy should collect all the energy? (y-intercept should be zero?) E (measured) E (true)

9. Energy resolution E (true)E (measured)

10. Resolution as # layer decrease, not calibrated ( CC, QE, old geom, 5.2PE/MeV)

11. Resolution decrease due to leakage ( CC, QE, old geom, 5.2PE/MeV)

12. Resolution as # layer decrease, not calibrated ( CC, QE, new geom, 5.2PE/MeV)

13. Resolution decrease due to leakage ( CC, QE, new geom, 5.2PE/MeV)