Changes

My research thus far has been focused on examining the electronic properties of the active collimator. I spent a few weeks working on capturing waveforms with a [[Media:jbtdsmanual.pdf|'''Tektronix TDS 2024 Digital Storage Oscilloscope''']] by tapping the pin cushions with a piece of metal that I was holding in order to build up a charge on the cushion. I connected each of the tungsten pin cushions within the active collimator to cables with an RF coaxial adapter input which was connected to the face plate and a BNC output which was connected to a [[Media:JbAmplifier.pdf|'''PMT-5R amplifier''']]. I used a [[Media:JbPowersupply.pdf|'''F-100PS 15 Volt DC Power Supply''']] to power the amplifiers. However, I did not have control over the amplifier's gain setting with this setup.

My research thus far has been focused on examining the electronic properties of the active collimator. I spent a few weeks working on capturing waveforms with a [[Media:jbtdsmanual.pdf|'''Tektronix TDS 2024 Digital Storage Oscilloscope''']] by tapping the pin cushions with a piece of metal that I was holding in order to build up a charge on the cushion. I connected each of the tungsten pin cushions within the active collimator to cables with an RF coaxial adapter input which was connected to the face plate and a BNC output which was connected to a [[Media:JbAmplifier.pdf|'''PMT-5R amplifier''']]. I used a [[Media:JbPowersupply.pdf|'''F-100PS 15 Volt DC Power Supply''']] to power the amplifiers. However, I did not have control over the amplifier's gain setting with this setup.

Igor developed a data acquisition LabView program for the active collimator. The program allows the user to vary the gain setting on the amplifiers from 10^6 to 10^12 in powers of ten, record the potential difference across each of the tungsten pin cushions at a frequency of about 800 data points per second, and calculate Fourier transforms on the received signals. The program is run on a PC that Alex Barnes and I built which contains a  data acquisition card. The [[UConn Collimator Station pics|'''active collimator station''']] was positioned in P403.

Igor developed a data acquisition LabView program for the active collimator. The program allows the user to vary the gain setting on the amplifiers from 10^6 to 10^12 in powers of ten, record the potential difference across each of the tungsten pin cushions at a frequency of about 83 kHz, and calculate Fourier transforms on the received signals. The program is run on a PC that Alex Barnes and I built which contains a  data acquisition card. The [[UConn Collimator Station pics|'''active collimator station''']] was positioned in P403 until January 3rd, 2014.

==Trip to JLab==

==Trip to JLab==

I traveled to Jefferson Lab in Newport News, Virginia from January 4th to January 15th during my 2014 winter break. I recorded a [https://docs.google.com/document/d/150Arri-9OrtY8MvuYq3-ornS6aNieYamTW23UPPa9nM '''day to day log'''] (search "JLab trip"). I have also created a [https://docs.google.com/spreadsheet/ccc?key=0Atw6FQAT9tl0dEZjT1dMX1JRS3VoWWU3UmJVU1liVXc&usp=drive_web#gid=0 '''travel expenses spreadsheet'''] and an [https://docs.google.com/spreadsheet/ccc?key=0Atw6FQAT9tl0dEZfdVdBZVdfSU5jRDVLbW55NTBrZEE&usp=drive_web#gid=0 '''inventory spreadsheet'''].

I traveled to Jefferson Lab in Newport News, Virginia from January 4th to January 15th during my 2014 winter break. I took the active collimator station with me. I recorded a [https://docs.google.com/document/d/150Arri-9OrtY8MvuYq3-ornS6aNieYamTW23UPPa9nM '''day to day log'''] (search "JLab trip"). I have also created a [https://docs.google.com/spreadsheet/ccc?key=0Atw6FQAT9tl0dEZjT1dMX1JRS3VoWWU3UmJVU1liVXc&usp=drive_web#gid=0 '''travel expenses spreadsheet'''] and an [https://docs.google.com/spreadsheet/ccc?key=0Atw6FQAT9tl0dEZfdVdBZVdfSU5jRDVLbW55NTBrZEE&usp=drive_web#gid=0 '''inventory spreadsheet'''].

===Tour of Hall D===

===Tour of Hall D===

On January 10th, Sascha Somov took me to the accelerator site for a tour of the Hall D facility. Below are some pictures I took during the tour. Note that the pictures follow the direction of the photon beamline; each successive picture is downstream from the previous picture. The tour started with the [[Collimator Cave |'''"Collimator Cave"''']], which is the future home of the active collimator.

On January 10th, [[Sascha Somov]] took me to the accelerator site for a tour of the Hall D facility. I took a number of pictures during the tour. Note that the pictures follow the direction of the photon beamline; each successive picture is downstream from the previous picture. The tour started with the [[Collimator Cave |'''"Collimator Cave"''']], which is the future home of the active collimator. We then toured the [[Hall D main room| '''Hall D main room''']]. Inside were the Barrel Calorimeter (BCAL) and Forward Calorimeter (FCAL) which will be used in identifying the resultant particles from the interaction of the photon beam with the liquid hydrogen target.

 

=====Hall D Main Room=====

This room houses the Barrel Calorimeter (BCAL) and Forward Calorimeter (FCAL) which will be used in identifying the resulting particles from the interaction of the photon beam with the liquid hydrogen target. Pics can be found [[Hall D main room|here]].

===Relocation of the Active Collimator Station===

===Relocation of the Active Collimator Station===

The actcol-station is set up in F117 of the CEBAF building at Jefferson Lab. I have created a [https://halldweb1.jlab.org/wiki/index.php/University_of_Connecticut_Active_Collimator_Station_Tutorial  wiki page] that teaches a user how to operate the station.

The actcol-station is set up in F117 of the CEBAF building at Jefferson Lab. I have created a [https://halldweb1.jlab.org/wiki/index.php/University_of_Connecticut_Active_Collimator_Station_Tutorial  '''wiki page'''] that teaches a user how to operate the station.

==Data Analysis==

==Data Analysis==

I have been using the C++ based program ROOT in order to analyze the data obtained from the active collimator.

I have been using the C++ based program ROOT in order to analyze the data obtained from the active collimator. My final results during my work in Dr. Jones's lab can be found in this [https://drive.google.com/file/d/0B9w6FQAT9tl0Mmtib3Ntbk5vZEE/edit?usp=sharing '''pdf'''].