Cosmic Ray e-Lab Fellows, Center Group
Submitted by rspete
on Monday, October 8, 2012 - 10:46
Workbench space for e-Lab Fellows to create, edit, and store workshop resources and documents.
library for workshop documents
Here are the instructions for uploading data to the eLab AND to the Data Diary.
The Data Diary is located at: https://sites.google.com/view/quarknet2017eclipse/data-diary
These are the EQUIP settings for the Eclipse Experiment. PLEASE NOTE: all 4 counters should be checked as triggers.
These are the instructions to create the group account, Eclipse#### for your experiment. The #### is your DAQ number.
This is the updated instructions for the fixed cosmic ray telescope, including opaque bag over the counters to reduce light leaks.
Here is the updated version of the telescope. We have included minor changes and the use of opaque bags around the counters to reduce problems of light leaks.
The theme of the UIC QuarkNet summer workshop was preparation for the solar eclipse. Eighteen students and 5 teachers assembled and tested three varieties of cosmic ray telescopes: fixed-angle; tracking with plumbing pipe sframe; and tracking with PVC support.
With fixed angle telescopes, students measured the cosmic ray rates pointing at empty sky, at the moon and at the sun. This was done by dead reconning inside a building with no view of the sky. We relied on a nice website suncalc.org (mooncalc.org) that agreed well with the sun's position at the time. In the short runs, there was no observed difference in muon rates in the sky at the same zenith angle for those three conditions. Changes due to cahnges in pressure were seen. Rate ariation versus zenith angle were also measured and were consistent with a cos2(theta) dependence. In one test it was verified that the muon rate does not vary with vertical position, onthe scale of our telescopes.
Tracking telescopes were assembels and tested outside. They both tracked the sun well, but we have to correct several problems:
1. the motor drive for the pipe version stopped working, so we must debug why the controller can no longer initialize itself.
2. the PVC version is heavy and we need to extend the counter blancing weight further from the rotation axis or add more mass.
Several alignment techniques were tried and it seem easy to align using the shadow cast by a tube, cross-hairs target of telescope shadow itself.
For both types of telscope initial steps were taken decide which muon rates for what types of scintillator combinations will be most useful. The normalization scheme using pairs of counters at teh top or bottom of the telescope worked well.
Great successes and lot of progress!
How to Run EQUIP from Raspberry Pi
In Command Prompt type: sudo apt-get install librxtx-java
In web browser, go to cosmic ray elab. in Library, Resources, select EQUIP java interface and download EQUIP_18JUL2014.
You can put this anywhere you want but I would suggest on the desktop. (The rest of this walkthrough is assuming the Desktop.)
To run EQUIP:
Open the terminal so you have a command prompt.
Make sure your directory is in the Equip Folder:
Make a copy of the following script and paste into the command line:
java -Djava.library.path=/usr/lib/jni -cp /usr/share/java/RXTXcomm.jar -jar EQUIP_18JUL2014.jar
Create and save your file name before you find the port.
in log file:
select Choose File and assign the in the EQUIP folder on your desktop or on a USB Drive
select: media, pi,(USB Name), EQUIPDATA (if you want it to be in a folder with this name)
Create a new file name: I suggest something like:
Note: Stack_46cm indicates that I have a stacked geometry with a 46cm difference between counters 1 - 4.
You should have something like this to note your geometry to make it easier to identify your data.
Save (you can check to see that your file got created by looking in the data folder you want it to go in)
Find your DAQ in Choose Port. You will know you found it when the screen fills with your information. Wait to make sure you have enough satellites, make sure you have your settings the way you want and enable counts.