TAU - status

TAU - status TAU - status - Start

2016-07-25 30K 30 0 0

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December 14. Lab setup. 9/7/2011. TAU - status report. 2. Each RO line is X100 Attenuated and 100. Ω. terminated. 10 . μ. m position precision of collimated source. Discriminator. 10 RO lines. VME V560. ID: 419798 Download Presentation

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TAU - status




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Presentations text content in TAU - status

Slide1

TAU - status

December 14

Slide2

Lab setup

9/7/2011

TAU - status report

2

Each RO line is X100 Attenuated and 100

Ω terminated

10

μm position precision of collimated source

Discriminator

10 RO lines

VME V560

counter

HV line quenched with 20M

Ω

connected to a

1M

Ω

/100M

Ω

voltage divider

Slide3

Source position

9/7/2011

TAU - status report

3

Source sits here

1cm thick,

Delrin

collimator, with a 3 mm slit opening

Slide4

All night measurement

collimated Source was left on the same position (above RO channel 7) for ~14 hours.

9/7/2011

TAU - status report

4

Slide5

9/7/2011

TAU - status report

5

Each histogram shows the ratio between each channel and the channel beneath the source (7).

hour

ratio

1

2

3

4

5

6

7

8

9

10

Slide6

Position scan

Each full turn of the micrometer moves the source by 1mmStarted the scan when the micrometer read is 60mmMade 16 measurements each of 5minutes and 1mm apart. CF4 gas, 600 Torr, 1316V .Actual voltage on the panel is ~4/5 of the HV applied due to the voltage divider.

9/7/2011

TAU - status report

6

Slide7

9/7/2011

TAU - status report

7

49mm

50mm

51mm

52mm

53mm

54mm

55mm

56mm

60mm

59mm

58mm

57mm

cpm

Channel

Slide8

Source position measurement

9/7/2011

TAU - status report

8

points in this graph are the

Gaussian

fit results

E

rrors are

σ

/

(n-1

)

Numbers in the x-axis have no global meaning, simply the read of the micrometer and not the distance from any real point in space…

The electrode pitch in this panel (10 electrodes per inch) is the slope of this line: 0.4 electrodes per mm…

Slide9

XY signal processing

Measuring the pulse as a function of HV line number.

RO

85

24

105

55

Volts

Time

Panel

HV

Slide10

HV lineArea Width at bottom Width at 60%Maximum 2446.777 bins21 bins 1.365551.575 bins33 bins 1.28547.780 bins64 bins 0.99510548.382 bins57 bins 1.05

XY signal processing

Cutting out the noise. Flipping the signal to the positive side. Trying to discriminate between the two pulses (table above).

None of the quantities

above seems to give good separation between the two pulses.

Slide11

Last minute plots …

Seems that the r/o pulse can be parameterized according an electric damped oscillator

9/7/2011

TAU - status report

11

Slide12

r/o pulse fit

9/7/2011

TAU - status report

12

If we supposed R=100 ohms, the fit results gives

C=15pF

Slide13

Future plans

Measuring the signal at stripe #1, we expect to get the signal shape with a factor 2. This should include the negative side of the bi-polar signal.

Fitting the two pulses with the shape extracted from the above measurement. Allowing the location of the two signals to float.

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