Changes

<gallery>

<gallery>

file:JbInside.jpg|Inside the active collimator. The tungsten pin cushions are secured onto the boron-nitride insulating cup.

file:JbFaceplate.jpg|The collimator's face plate.  

file:JbInside.jpg|A picture of the inside of the active collimator. The tungsten pin cushions are secured onto the boron-nitride insulating cup.

file:JbGroundedcup.jpg|The grounded cup.

file:JbGroundedcup.jpg|The grounded cup.

file:JbIgorexplodedview.png|A diagram that labels the components of the active collimator. Credit to Igor Senderovich.

file:JbIgorexplodedview.png|A diagram that labels the components of the active collimator. Credit to Igor Senderovich.

==Data Acquisition==

==Data Acquisition==

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]]. I connected each of the tungsten pin cushions within the active collimator to a cable with an RF coaxial adapter input which was connected to the face plate and a BNC output which was connected to a PMT-5R amplifier.

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 80 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. Below are pictures of the pieces of equipment used for data acquisition.

<gallery>

<gallery>

file:JbActcolstation.jpg|Inside the active collimator. The tungsten pin cushions are secured onto the boron-nitride insulating cup.

file:JbAmplifier.jpg| A PMT-5R amplifier. The signal from each pin cushion in the active collimator passes through one of these before it is sent to the PC.

file:JbFaceplate.jpg|The collimator's face plate.  

file:JbPowersupply.jpg| The power supply used to power the amplifiers.

file:JbGroundedcup.jpg|The grounded cup.

file:JbTerminalboard.jpg| The terminal board that is used in collaboration with the data acquisition card installed in the PC.

file:JbIgorexplodedview.png|A diagram that labels the components of the active collimator. Credit to Igor Senderovich.

file:JbActcolstation.jpg|The active collimator station in Dr. Jones's lab.

file:JbCollimatorclose.jpg|A close-up view of the active collimator connected to the amplifiers.

</gallery>

</gallery>

==Data Analysis==

==Data Analysis==