Stony Brook Update Bill and Ted’s Cosmic Adventure

1. Stony Brook UpdateBill and Ted’s Cosmic Adventure T.K. Hemmick for the Wyld Stallions

2. Cosmic Studies are Finished. • Ted has now finished all his Cosmic data taking. • This includes first measurements of gain on all stacks at dV=475 (running simultaneously). • Also includes 2nd measurements for outliers Excellent!!!

3. Scintillation used to get Gain • Fit to Gaussian + Exponential. • Gain from: • Use ADC gain from manual (pC/channel) • 2000 e’s/mV from pre-Amp • Checks with Bob to ~10%

4. Bill S Preston, esq. • The left column is the gain at dV=475. • The blue box shows the required dV to get gains of 2000, 4000, 6000, 8000, 10000 • The green box is the chain V. • Blue & Green are calculated (not measured). • See below for technique…

5. Ted Theodore Logan • The left column is the gain at dV=475. • The blue box shows the required dV to get gains of 2000, 4000, 6000, 8000, 10000 • The green box is the chain V. • Blue & Green are calculated (not measured). • See below for technique…

6. How to get Gain Curves • 3 “Gain-Slope” Determinations: • Vlad’s Cosmics = 0.0695 • Tom’s 55Fe spectrum = 0.0624 • Bob’s Scintillation Cube Measurement = 0.0672 • All yield same answers to w/in a few volts dV

7. Plotting Bill’s Gain Curves

8. Plotting Ted’s Gain Curves

9. Remaining Topics • When to move (Thursday Dec 4 preferred) • Scintillation Cube Spectra. • Trip Strategy w/ 2 power supplies. West East