Difference between revisions of "IAC 1-4-08"
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= Apparatus = | = Apparatus = | ||
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[[Image:DC_Config_1-4-08.jpg | 200 px]] | [[Image:DC_Config_1-4-08.jpg | 200 px]] | ||
[[Image:DC_Config_WideView_1-4-08.jpg | 200 px]] | [[Image:DC_Config_WideView_1-4-08.jpg | 200 px]] | ||
| + | The left figure above shows a close up view of the first Aluminum course collimator, followed by a wide (blue) scintillator, then an Aluminum brick with a 3 mm diameter hole, followed by the Drift chamber known as Plastica, then Metallica. Both detectors are sitting on a translation table capable of moving both horizontally and vertically. The right figure shows a wider view of the apparatus. Another scintillator paddle was placed downstream of the drift chambers. An efficiency measurement is facilitated using a coincidence formed between the first two scintillators which sandwhich the drift chambers. | ||
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| − | + | We had an Aluminum brick with three different diameter (1, 3, and 6 mm) holes. | |
We put an aluminum brick in front of the electron beam in order to look at photons hitting the Drift Chamber. | We put an aluminum brick in front of the electron beam in order to look at photons hitting the Drift Chamber. | ||
We saw a signal out of the drift chamber once for every 10 gun pulses. | We saw a signal out of the drift chamber once for every 10 gun pulses. | ||
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| + | ==Alignment == | ||
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[[Image:Gun-Metalica_PostAmp_1-4-08_A.jpg | 200 px]] | [[Image:Gun-Metalica_PostAmp_1-4-08_A.jpg | 200 px]] | ||
Revision as of 16:29, 18 February 2008
Today we installed the drift chambers and had our first beam on target.
DC HV and Gas
90/10 ArCo2
| HV settings | ||
| Wire | Volts | current (A) |
| Sense | 1500 | |
| Field | -750 | |
| Guard | 750 | |
Apparatus
The left figure above shows a close up view of the first Aluminum course collimator, followed by a wide (blue) scintillator, then an Aluminum brick with a 3 mm diameter hole, followed by the Drift chamber known as Plastica, then Metallica. Both detectors are sitting on a translation table capable of moving both horizontally and vertically. The right figure shows a wider view of the apparatus. Another scintillator paddle was placed downstream of the drift chambers. An efficiency measurement is facilitated using a coincidence formed between the first two scintillators which sandwhich the drift chambers.
We had an Aluminum brick with three different diameter (1, 3, and 6 mm) holes.
We put an aluminum brick in front of the electron beam in order to look at photons hitting the Drift Chamber.
We saw a signal out of the drift chamber once for every 10 gun pulses.
