GRAND+2010

**Abstract: Project GRAND **

Results: A relationship between the time of day and the muon counts was discovered.
=== Discussion and Conclusion: These results show that the muon rates mostly come from the sun, as we’ve seen in the relationship because most of the muons come around 3pm. This also confirms the Archimedes Spiral, in that the highest muon count is not at noon, but at 3pm. ===

Further work: Muons are affected by several variables. To continue research, we would like to find other variables that alter muon counts.
__Group Name__: Project GRAND __Students__: Ellen and Patrick __Logsheet 01__

//Monday//: __Date__: 6/21/10 Progress: -Learned troubleshooting steps to maintain huts. (Check VALREG data, check data signal on oscilloscope) -Checked diagnostic data of huts. -Checked high voltage current in all quads -Found chamber 2 in hut 44 was drawing high current at ~358 uA.

//Tuesday//: __Date__: 6/22/10 Progress: -Today we went into all huts (16) of the NE quarter and probed peg 4 on chip u11 on station electronics board. -Scoped this to find hold off pulse, turned r24v POT to maximize the RC time capacitance. -Changes of time capacitance were typically from about 10us to 13 us.

//Wednesday//: __Date__: 6/23/10 Progress: -Cleaned dehumidifier in h84 and replaced dehumidifier in h46. -Scoped NWse quad because the entire quad was not working, determined a clock signal problem. -Tested F244 chips in quadbox, all checked out ok. Changed 123N chip, made no change. -Swapped clock cables in shed, still made no difference. (problem not in cable)

//Thursday//: __Date__: 6/24/10 Progress: -Found that the problem in NWse quad was a faulty power supply; we replaced it and the problem was solved. -Placed hygrometer into h46 -Checked high voltage in NEne quadbox, found H87 to be somewhat high at ~2.31 uA -H44 had a previous problem (see Monday) with chamber 2 drawing high current. We removed high voltage to chamber 2 and removed it from coincidence.

//Friday:// __Date__: 6/25/10 Progress: -Checked gray huts (huts 12,13,16,17,51,78,88,83,82) for working humidifier, type of station electronics board, missing chambers and the type of sealing between chambers. -Cleaned blockage in H21 dehumidifier hose to allow for drainage. -Troubleshooted red H24, found clock problem. Checked chips, all checked out okay. Checked oscilloscope again, and good data was coming in again.

__Group Name__: Project GRAND __Student__: Patrick Peek and Ellen Nightingale __Logsheet 02__

//Monday//: __Date__: 6/28/10 Progress: -Checked the dehumidifier and humidity in hut 46, then increased the settings -Traced all the outlets in and outside the trailer to their switch in the fuse box and labeled them. -Hammered shims in hut 36 -Started a current survey for the SW quad and the SE quad, which consisted of reading different instruments that tracked the current and the voltage

//Tuesday//: __Date__: 6/29/10 Progress: -Went down to Prof. Poirier's office -Looked at Dayfiles from the data gathered at Grand -Looked for gaps in the data from 2006 to 2010 (skipping 2008) where the database received no data

//Wednesday//: __Date__: 6/30/10 Progress: -Killed bee hives -Swapped out dehumidifiers in hut 73, and cleaned the DHF in hut 32 -Cleaned out the trailer -Harvested parts off of old broken machinery

//Thursday//: __Date__: 7/1/10 Progress: -Tested the distance of a wireless transmitter by sending the transmitter around the field in different places, inside and outside the huts -Harvested more parts out of broken machinery -Finished high voltage survey with the NW and NE

//Friday:// __Date__: 7/2/10 Progress: -Inspected all huts for external damage -Analyzed the effects of the change in resistance on hut 54

Group Name: Project GRAND Students: : Patrick and Ellen Logsheet 03 //Monday//: __Date__: 7/12/10 Progress: -Analyzed High Voltage survey data for any significant losses. -Found that there may be a problem with the High Voltage regulator in the NE quarter. -Started gas flow survey of SW quad; completed survey in SWne quad. -Caulked holes in SWne quadbox.

//Tuesday//: __Date__: 7/13/10 Progress: -Worked on campus -Typed found data from last week -Looked for patterns over 3 days long in the data

//Wednesday//: __Date__: 7/14/10 Progress: -Adjusted the shims in the huts -Looked through old logs to find more about past changes in huts -Continued to check the gas meters throughout the SW quarter

//Thursday//: __Date__: 7/15/10 Progress: Fermilab

//Friday:// __Date__: 7/16/10 Progress: -Worked on fixing the stop and start fiducial of H73. Changed out the clock splitter and probed other clock signals. No change. -Did new gas survey of SW quarter; small improvement in leakages from main distribution box to each quad box. -Tightened all nuts in main distribution box in SW quarter and all 4 quad boxes. 