September 21, 2007 - Cosmic Telescope

Nathan:

Please create a table below which records all of the 60 degree data

Then calculate the variance of the data in that table.

Measure coincidence cosmic rates at an angle of 75 degrees over the weekend.

Then during next week lets do 45 degrees overnight and continue the 0 degrees during the day.

Cosmic rates measured each hour when the telecope accepts cosmics which intersect the earth's surface at 45 degrees.

Angular Distribution at 60 degrees
Angle Measure	Dates Run	Time elapsed (hour)	Singles Count (on top)	Coinc. Counts	Coinc. per hour	[math]\sqrt{N}[/math]
60	8/29-8/31	48.3	323170	1514	31.37	.8062
60	9/7-9/10	72	484028	2562	35.58	.7029
300	9/14-9/17	69	618643	4147	60.1	.9333
300	9/17-9/18	21	133792	1108	52.8	1.59
300	9/18-9/19	21	194602	1210	57.62	1.656
300	9/19-9/20	21.083	176564	1111	52.69	1.581
300	9/20-9/21	21.083	130154	1012	48	1.509

Cosmic rates measured each hour when the telecope accepts cosmics which intersect the earth's surface at 300 degrees to the perpendicular.

Time Start	Time Stop	Time elapsed (hour)	Singles Count (on top)	Coinc. Counts	Coinc. per hour	[math]\sqrt{N}[/math]	[math]\sqrt{(x_i-\bar{x})^2}[/math]
4:13 pm of 9/20	1:18 pm of 9/21	21.083	130154	1012	57.62	1.656

Cosmic rates measured each hour when the telecope accepts cosmics which intersect the earth's surface perpendicularly (defined as zero degrees).

Time Start	Time Stop	Time elapsed (hour)	Singles Count (on top)	Coinc. Counts	Coinc. per hour	[math]\sqrt{N}[/math]	[math]\sqrt{(x_i-\bar{x})^2}[/math]
1:22 pm	2:22 pm	1	5733	129	129	11.36	25.33
2:22 pm	3:52 pm	1.5	13951	182	121.33	11.01	17.66
							[math]\sigma = \sqrt{\frac{\sum (x_i - \bar{x})^2}{N-1}}[/math]
1:26 pm	3:56 pm	2.5	13951	311	103.667	5.879	30.88