Copasetic Flow

Summary:   Most of the morning was spent hooking up the last few wires on the iron magnet, and figuring out which section of EM I’ll be TA’ing for.  In the afternoon, the pulsed current supply for the fast magnet was fired while taking background spectral data with the NaI detector.  There was no recognizable effect caused by firing the pulser. If you're new to the experiment, please scroll to the bottom for background information. Magnet Work Spades were attached to the four wires of the three phase power cord.  These were in turn attached to the magnet power supply.  The power supply case was grounded per the instructions The chiller was turned on along with the coil cooling supply, (the sink faucet).  The flow of the coil cooling supply was increased until the bucket/timer flow meter indicated two gallons per minute.  The position of the cold water know with a flow of two gallons per minute is shown below. ...

Summary :  Things are getting more hectic with classes starting back up and a few other projects running around the lab.  A new run was taken with the Cd 109 source spaced as in the Dewar, but without the Dewar present.  The count rates ramped right back up as expected.  It still remains to find out why the Cd 109 source appeared to be more attenuated than the Cs 137 source. If you're new to the experiment, scroll to the bottom for more background. Bias 1500 V Gate Window 0.5 uS Threshold 1.5mV Attenuation 0 dB Data set HBC_00022 Source Cd 109 Dewar spacing, but no Dewar Start Time 8:29 AM Stop Time 11:22 Date 2014_08_20 – 2014_08_21 x-y scope V/div 1, 0.5 Shielded? Yes Tube Harshaw B- Without the Dewar present, the count rates we...

Summary :  It was a somewhat uneventful day.  Current carrying cables to connect the power supply and the iron yoke magnet were constructed.  A detector longer run was made with the Cd 109 source, but the peak resolution did not improve. If you're new to the experiment, scroll to the bottom for background. Six gauge quarter inch copper crimp lugs were attached to the ends of two lengths of cable.  These cables will transmit current from the power supply to the magnet. To Do: Add terminal lugs for power cord.  Wire chassis to ground. Detector Work A longer counting run was made using the Cd 109 source.  The results will be entered in tomorrow’s lab book.  There was not a significant improvement in peak resolution. Bias 1500 V Gate Window 0.5 uS Threshold 1.5mV Attenuation 0 dB Data set HBC_00021 Source Cd 109 in Dewa...

Summary:   Longer spectrum runs were performed on each of the available low energy sources.  The channel vs. energy graph was re-plotted based on the new data.  The behavior is still linear.  The only issue at the moment, is that the signal levels are close to the noise count levels, causing the peaks from each of the sources to be fairly broad.  This should be OK.  since we're just looking for evidence of a signal at all, resolution won't be critical in this application.  The iron magnet cooling supply was completely installed and can supply two gallons per minute to the magnet, meeting the specification.  A Cs 137 Dewar attenuation spectrum was started.  The data will be collected on the morning of the 21 st . Bias 1500 V Gate Window 0.5 uS Threshold 1.5mV Attenuation 0 dB Data set HBC_00015 Source Cs 137 Taped to window Start Time 8:53 AM ...