SiPM-2009

__Group Name__: SiPM __Student__: Emily Back __Logsheet 01__ //Monday//: __Date__: 6/15/09 Progress: -introduction and in depth explanation of the SiPM project -We entered data and created 4 graphs dealing with the Hamamatsu programs (with 400 and 1600 pixels); I learned how to operate the SiPM detector to compare results between the programs as well.

//Tuesday//: __Date__: 6/16/09 Progress: -Today we entered more data from working with the SiPM detector. We changed the gate width as a variable and measured 30ns, 100ns, and 200ns with both the 400 pixel SiPM and the 1600 pixel devices. Three trials were done for each component. The thresholds had 1, 2, 3, and 4 photoelectrons. We compiled the graphs from yesterday, plus the new graphs from today into two files so that all of the data from the Ham-400 and Ham-1600 was in the same file location under the same folder.

//Wednesday//: __Date__: 6/17/09 Progress: -Today we experimented and retrieved data from the SensL-1mm device @ room temperature with voltage increments @ 29.5, 30.0, 30.5, 31.0, and 31.5 V. We also created better graphs for the DC study Ham-400 and Ham-1600 which display data (averaged) so it’s more visible and easier to read. We found two online articles to further research our experiment. We tried to find out how many pixels the SensL-1mm device has, but were unsuccessful.

//Thursday//: __Date__: 6/18/09 Progress: -Today, we started (and finished) doing the dark count on the Sensl-3mm SiPM @ room temperature. We made a graph of the averages and placed it in the appropriate data folder on our computer. When we were finished with that, we started to log information from a 1 mm Sensl device with a qvt program wired to a Mac computer. This is important because it sorts information and takes time out of the equation, unlike the SiPM detector. We tested 29.5V and 30.0V. Tomorrow, we plan on doing the rest of the voltages with 0.5 increments until we reach 31.5.

//Friday: //__Date__: 6/19/09 Progress: -Today, we continued working on the Mac computer and finished what we were doing yesterday by completing up to 31.5V with the Sensl device. We started using the qvt to test the Hamamatsu-400 device (70.0V) with LED and after cooling as well (temp. ranging from 29.4 degrees C- 25.6 degrees C after being room temperature and cooled respectively). Two runs were done, with the Hamamatsu-1600 by the qvt (also @ 70.0V and room temp.). Data was recorded and graphs were made. We started to blog our progress.

__Logsheet 02__ 

//Monday //: Date: 6/22/09 Progress: -Today, we worked with the Sensl SiPM devices of both the 1mm and 3mm types. A constant voltage (30.5V) and gate width (100ns) were set for the data as of today. We manipulated with temperature cooling to -20 degrees C for some data or keeping it at room temperature. We also turned the LED on and off at about 50 kcps and about 1.9 V. Using a qvt, we conducted and analyzed this data.

//Tuesday //: Date: 6/23/09 Progress: -Today we continued testing the Sensl devices using a qvt (just like yesterday). Again, we turned the LED on and off and manipulated with the temperature (cooling to about -20 degrees C/ maintaining room temperature). We found out that 2.1V is the best voltage for the 1mm device. The S1037A run was very challenging and we ended up testing it over and over up to six times to find a good distribution. I also found out more background information for other projects @ QuarkNet and I researched CERN’s accelerator.

//Wednesday //: Date: 6/24/09 Progress: -Today we analyzed, condensed, and sorted our data into a more readable and organized format. Instead of having many data sheets (over 65 pages) to flip through, we organized it and entered it into an Excel document where it will be easier to find certain information all in one place. The qvt program was updated, and we were able to read the graphs of runs S1012A and S1017A easier.

//Thursday //: Date: 6/25/09 Progress: -Today I didn’t work with SiPM’s because QuarkNet took a trip to Fermilab near Chicago, IL. We were gone all day.

//Friday: //Date: 6/26/09 Progress: -Today we further organized and color-coordinated our data. About 16 more qvt tests were run (dealing with the 1mm Sensl SiPM). The temperature was changed using temperatures of -15, -10, and room temperature. The voltages were changed as well. For each temperature, there were 5 different runs with voltages set at 29.5-31.5. The LED was also on for all of the runs and its voltage was set at a constant 2.25V for all runs and its pulse rate was a constant 50kcps.

__Logsheet 03__  //Monday //: <span style="font-family: 'Times New Roman', Times, serif;">__Date__ <span style="font-family: 'Times New Roman', Times, serif;">: 6/29/09 Progress: -Today, we worked with the Sensl-1mm SiPM devices and a qvt test was conducted with temperatures consisting of -5 degrees C and 0 degrees C. The LED was turned off and on. Graphs were made with the analysis program on the computer and data was recorded and analyzed. We started to graph dark count vs. bias voltage in the Sensl-1mm temperature study. We found out that that particular SiPM favored the temperatures of 0, -20, and Room Temperature, but we are not sure if the attenuator was on or not through our runs.

//<span style="font-family: 'Times New Roman', Times, serif;">Tuesday //<span style="font-family: 'Times New Roman', Times, serif;">: <span style="font-family: 'Times New Roman', Times, serif;">__Date__ <span style="font-family: 'Times New Roman', Times, serif;">: 6/30/09 Progress: -Today, 24 tests were run on the Sensl-1mm SiPM. Temperatures were set at 5, 10, and 15 degrees C, and within each temperature, voltages were changed using 29.5, 30, 30.5, 31, 31.5 V. The LED light was on for most of these runs, but we conducted a dark count once for each temperature @ 30.5V in addition to the rest. Data was analyzed using the qvt software and graphs were made.

//<span style="font-family: 'Times New Roman', Times, serif;">Wednesday //<span style="font-family: 'Times New Roman', Times, serif;">: <span style="font-family: 'Times New Roman', Times, serif;">__Date__ <span style="font-family: 'Times New Roman', Times, serif;">: 7/1/09 Progress: -Today, 11 tests were run on the Sensl-1mm SiPM. Temperature was set at 20 degrees C, and within this temperature, voltages were changed using 29.5, 30, 30.5, 31, 31.5 V twice. The LED light was on for half of these runs, and the other half, it was turned off to do a dark count. We set the threshold by hand in addition to doing our usual routine solely with the qvt. Data was analyzed using the qvt software and graphs were made. We updated our blog.

//<span style="font-family: 'Times New Roman', Times, serif;">Thursday //<span style="font-family: 'Times New Roman', Times, serif;">: <span style="font-family: 'Times New Roman', Times, serif;">__Date__ <span style="font-family: 'Times New Roman', Times, serif;">: 7/2/09 Progress: -Before the 4th of July Quarknet picnic, we ran tests on the Sensl-1mm device as usual. We tested at -15 degrees with the LED on and voltages ranging from 29.5V-31.5V. Also, we tested at -20 degrees with the LED off, changing voltages from 29.5-31.5 along the way. Lastly, we tested the SiPM at -10 degrees with the LED on and voltages ranging from 29.5-31.5.

<span style="display: block; text-align: center; font-family: 'Times New Roman', Times, serif;">__Logsheet 04__ <span style="display: block; text-align: center; font-family: 'Times New Roman', Times, serif;"> //<span style="font-family: 'Times New Roman', Times, serif;">Monday //<span style="font-family: 'Times New Roman', Times, serif;">: <span style="font-family: 'Times New Roman', Times, serif;">__Date__ <span style="font-family: 'Times New Roman', Times, serif;">: 7/6/09 Progress: -Absent

//<span style="font-family: 'Times New Roman', Times, serif;">Tuesday //<span style="font-family: 'Times New Roman', Times, serif;">: <span style="font-family: 'Times New Roman', Times, serif;">__Date__ <span style="font-family: 'Times New Roman', Times, serif;">: 7/7/09 Progress: -Using the 3mm Sensl SiPM, we tested at -10 degrees C with the LED on and voltages ranging from 29.5V-31.5V. We also did one noise study @ 30.5V. Also, we tested at 0 degrees C with the LED on, changing voltages from 29.5-31.5 along the way. Lastly, we tested the SiPM at -20 degrees with the LED on and voltages ranging from 29.5-31.5. Again, a noise study was done only at 30.5V.

//<span style="font-family: 'Times New Roman', Times, serif;">Wednesday //<span style="font-family: 'Times New Roman', Times, serif;">: <span style="font-family: 'Times New Roman', Times, serif;">__Date__ <span style="font-family: 'Times New Roman', Times, serif;">: 7/8/09 Progress: -Using the 3mm Sensl SiPM, we tested at -20 degrees C to do a dark count study. Also, we tested at 10 degrees C with the LED on, changing voltages from 29.5-31.5 along the way. A noise study with voltages ranging from 29.5-31.5 was also done on 10 degrees C. Lastly, we tested the SiPM at 20 degrees with the LED on and voltages ranging from 29.5-31.5. Again, a noise study was done at these voltages as well.

//<span style="font-family: 'Times New Roman', Times, serif;">Thursday //<span style="font-family: 'Times New Roman', Times, serif;">: <span style="font-family: 'Times New Roman', Times, serif;">__Date__ <span style="font-family: 'Times New Roman', Times, serif;">: 7/9/09 Progress: -Using the 3mm Sensl SiPM, we tested at Room Temperature with the LED on and voltages ranging from 29.5V-31.5V. We also did a noise study at these voltages. We found out that our data that we did before on the 18th of June wasn’t consistent. We tried lowering the voltage down to 25V @ Room Temperature, but it didn’t work out too well.

//<span style="font-family: 'Times New Roman', Times, serif;">Friday //<span style="font-family: 'Times New Roman', Times, serif;">: <span style="font-family: 'Times New Roman', Times, serif;">__Date__ <span style="font-family: 'Times New Roman', Times, serif;">: 7/10/09 Progress: -Today, the qvt was occupied, so we used the discriminator to set the thresholds by hand to to the following tests: 1. Sensl-3 mm @ 20 degrees C 2. Sensl-3 mm @ 0 degrees C We also wrote our abstract for the project and we tried to start graphing temperature vs. noise to see the correlations at different bias voltages.

<span style="font-family: 'Times New Roman', Times, serif;">__Logsheet 04__ //<span style="font-family: 'Times New Roman', Times, serif;">Monday //<span style="font-family: 'Times New Roman', Times, serif;">: __<span style="font-family: 'Times New Roman', Times, serif;">Date __<span style="font-family: 'Times New Roman', Times, serif;">: 7/13/09 <span style="font-family: 'Times New Roman', Times, serif;">Progress: <span style="font-family: 'Times New Roman', Times, serif;">-Today, we lowered the temperature to -25 and -30 degrees C. The LED was both on and off for both temperatures. We also set the threshold with the discriminator and recorded those results. We updated our blog, too. We also finished graphing “Temperature vs. Noise,” and we found that most of the graphs look identical. <span style="font-family: 'Times New Roman', Times, serif;"> <span style="font-family: 'Times New Roman', Times, serif;"> //<span style="font-family: 'Times New Roman', Times, serif;">Tuesday //<span style="font-family: 'Times New Roman', Times, serif;">: __<span style="font-family: 'Times New Roman', Times, serif;">Date __<span style="font-family: 'Times New Roman', Times, serif;">: 7/14/09 <span style="font-family: 'Times New Roman', Times, serif;">Progress: <span style="font-family: 'Times New Roman', Times, serif;">-Today, we finished up the -25 degrees C on the 1mm Sensl SiPM for the LED runs. We also dropped the temperature of the 1mm SiPM to -20 degrees C, and did just the LED runs on those, changing the voltages as usual (29.5V-31.5V). After that, we moved to the 3mm Sensl SiPM to -25 degrees C and did both the dark count and LED study for all of the bias voltages. <span style="font-family: 'Times New Roman', Times, serif;"> <span style="font-family: 'Times New Roman', Times, serif;"> //<span style="font-family: 'Times New Roman', Times, serif;">Wednesday //<span style="font-family: 'Times New Roman', Times, serif;">: __<span style="font-family: 'Times New Roman', Times, serif;">Date __<span style="font-family: 'Times New Roman', Times, serif;">: 7/15/09 <span style="font-family: 'Times New Roman', Times, serif;">Progress: <span style="font-family: 'Times New Roman', Times, serif;">-Today, we ran the 3mm Sensl SiPM at -30 degrees C, and we did a dark count for all of the voltages (29.5V-31.5V). We also did the regular spectrum for this temperature at these voltages as well. We discovered that we accidentally falsely named “-“ 20 degrees C “+” 20 degrees, so we had to redo the data using the threshold. Lucky for us, all of our other data was properly named. <span style="font-family: 'Times New Roman', Times, serif;"> <span style="font-family: 'Times New Roman', Times, serif;"> <span style="font-family: 'Times New Roman', Times, serif;"> //<span style="font-family: 'Times New Roman', Times, serif;">Thursday //<span style="font-family: 'Times New Roman', Times, serif;">: __<span style="font-family: 'Times New Roman', Times, serif;">Date __<span style="font-family: 'Times New Roman', Times, serif;">: 7/16/09 <span style="font-family: 'Times New Roman', Times, serif;">Progress: <span style="font-family: 'Times New Roman', Times, serif;">-Absent <span style="font-family: 'Times New Roman', Times, serif;"> <span style="font-family: 'Times New Roman', Times, serif;"> //<span style="font-family: 'Times New Roman', Times, serif;">Friday //<span style="font-family: 'Times New Roman', Times, serif;">: __<span style="font-family: 'Times New Roman', Times, serif;">Date __<span style="font-family: 'Times New Roman', Times, serif;">: 7/17/09 <span style="font-family: 'Times New Roman', Times, serif;">Progress: <span style="font-family: 'Times New Roman', Times, serif;">-Absent <span style="font-family: 'Times New Roman', Times, serif;"> <span style="font-family: 'Times New Roman', Times, serif;">