Difference between revisions of "TOF Light Attenuation"
(→TOF Light Attenuation) |
(→TOF Light Attenuation) |
||
| Line 8: | Line 8: | ||
The attenuation length found at FSU can be seen here: [http://hadron.physics.fsu.edu/TOF/database/SCIN_led.html| FSU attenuation length]. The mean is about 300cm. | The attenuation length found at FSU can be seen here: [http://hadron.physics.fsu.edu/TOF/database/SCIN_led.html| FSU attenuation length]. The mean is about 300cm. | ||
| + | The mean of a single attenuation parameter from fits to the data between 1/3 and 2/3 is about 225cm. | ||
| + | The mean values from the fits with two attenuation parameters are about 70cm and 500cm respectively. | ||
Revision as of 10:18, 28 July 2015
TOF Light Attenuation
Light attenuation in the TOF paddles are investigated
A closer look at the attenuation of light in the TOF paddles suggests the use of two attenuation lengths rather then just one. This gives a much better description over the full length of the paddles. The following figure shows a fit to the MPV positions of paddle 44 as a function of position along the paddle. The red curve shows a fit with two free parameters for the two attenuation lengths and one overall scale factor. The cyan curve shows a fit to the data from 1/3 to 2/3 along the paddle with a single attenuation length parameter. At FSU the attenuation length was determined with measurements at these two points along the paddle.
The attenuation length found at FSU can be seen here: FSU attenuation length. The mean is about 300cm. The mean of a single attenuation parameter from fits to the data between 1/3 and 2/3 is about 225cm. The mean values from the fits with two attenuation parameters are about 70cm and 500cm respectively.
