# 2009.11.11 Tests of EEMC geometry, version 6.1

Monte-Carlo setup:

- Throwing one photon per event
- Compare EEMC geometry v6.0 (pure lead) vs. v6.1
- Full STAR geometry configurations
**with and without LOW_EM option**
- Throw particles flat in eta (1.08, 2.0), phi (0, 2pi), and pt (6-10 GeV)
- Using A2Emaker to get reconstructed Tower/SMD energy (no EEMC SlowSimulator in chain)
- Vertex z=0
- ~50K/per particle type
- Non-zero energy: 3 sigma above pedestal

FYI: tests with v6.1 by Alice

Geometry configurations

**dashed/open red**: full STAR y2006, no LOW_EM, EEMC geometry v6.1
**solid red**: full STAR y2006, with LOW_EM, EEMC geometry v6.1
**dashed/open black**: full STAR y2006, full STAR y2006, no LOW_EM, EEMC geometry v6.0
**solid black**: full STAR y2006, full STAR y2006, with LOW_EM, EEMC geometry v6.0

### Sampling fraction of various EEMC layers (tower, SMD, pre1-,pre2-, post- shower)

**Figure 1:** Sampling fraction of various EEMC layers vs. thrown photon energy:

(a) tower s.f.; (b) tower s.f. distribution; (c) pre-shower1; (d) pre-shower2; (e) SMD, (f) post-shower

**Figure 2:** (left) Shower shapes and (right) shower shape ratios