1

Stony Brook UpdateBill and Ted’s Cosmic AdventureT.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…

Gain(475) 2000 4000 6000 8000 10000 2000 4000 6000 8000 10000N1 8069 454.9 464.9 470.7 474.9 478.1 3730.6 3812.3 3860.1 3894.0 3920.3N2 3458 467.1 477.1 482.9 487.1 490.3 3830.5 3912.2 3960.0 3993.9 4020.2N3 6225 458.7 468.6 474.5 478.6 481.8 3761.2 3842.9 3890.7 3924.6 3950.9N4 10835 450.7 460.7 466.5 470.6 473.8 3695.8 3777.5 3825.3 3859.2 3885.5N5 1314 481.0 491.0 496.8 501.0 504.2 3944.5 4026.2 4074.0 4107.9 4134.2

S1 853 487.2 497.2 503.0 507.2 510.4 3995.4 4077.2 4124.9 4158.9 4185.2S2 4034 464.9 474.9 480.7 484.8 488.0 3812.3 3894.0 3941.8 3975.7 4002.0S3 7147 456.7 466.7 472.5 476.6 479.8 3744.9 3826.6 3874.4 3908.3 3934.6S4 7147 456.7 466.7 472.5 476.6 479.8 3744.9 3826.6 3874.4 3908.3 3934.6S5 1729 477.1 487.1 492.9 497.0 500.2 3912.2 3993.9 4041.7 4075.6 4101.9

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Ted Theodore Logan

Gain(475) 2000 4000 6000 8000 10000 2000 4000 6000 8000 10000.00N1 3067 468.9 478.8 484.6 488.8 492.0 3844.6 3926.3 3974.1 4008.0 4034.3N2 11644 449.7 459.6 465.5 469.6 472.8 3687.3 3769.1 3816.8 3850.8 3877.1N3 2952 469.4 479.4 485.2 489.3 492.5 3849.1 3930.8 3978.6 4012.5 4038.8N4 5412 460.7 470.7 476.5 480.6 483.8 3777.7 3859.4 3907.2 3941.1 3967.4N5 6068 459.0 469.0 474.8 479.0 482.2 3764.2 3845.9 3893.7 3927.6 3953.9

S1 10824 450.7 460.7 466.5 470.7 473.9 3696.0 3777.7 3825.5 3859.4 3885.7S2 15088 446.0 455.9 461.7 465.9 469.1 3656.8 3738.5 3786.3 3820.2 3846.5S3 4592 463.1 473.0 478.8 483.0 486.2 3797.0 3878.7 3926.5 3960.4 3986.7S4 14924 446.1 456.1 461.9 466.0 469.2 3658.1 3739.8 3787.6 3821.5 3847.8S5 8200 454.7 464.7 470.5 474.6 477.9 3728.7 3810.4 3858.2 3892.1 3918.4

• 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

55Fe Gain

y = 6.0307E-12e6.2415E-02x

10

100

1000

470 475 480 485 490 495 500 505 510

dV(GEM)

mV

(sco

pe h

isto

)

Fe

Expon. (Fe)

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Plotting Bill’s Gain CurvesBill North

0

2000

4000

6000

8000

10000

12000

400 420 440 460 480 500 520

dV(GEM)

Ga

in

N1

N2

N3

N4

N5

Bill South

0

2000

4000

6000

8000

10000

12000

400 420 440 460 480 500 520

dV(GEM)

Ga

in

S1S2S3S4S5

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Plotting Ted’s Gain CurvesTed Side0

0

2000

4000

6000

8000

10000

12000

400 420 440 460 480 500 520

dV(GEM)

Ga

in

10

20

30

40

50

Ted Side1

0

2000

4000

6000

8000

10000

12000

400 420 440 460 480 500 520

dV(GEM)

Ga

in

11

21

31

41

51

9

Remaining Topics

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

West East