Reports until 17:24, Wednesday 23 July 2014
H1 General
jeffrey.bartlett@LIGO.ORG - posted 17:24, Wednesday 23 July 2014 (12955)
Cleaning in HAM3
   Did a vacuum and wipe down cleaning in HAM3. The visual inspection with the flashlight array did not show large amounts of contamination inside the chamber. There were many large pieces of metal in the wells underneath the support tubes. After removing this debris, wiping did not show additional metal on the Alpha wipe. 

   Particle counts were somewhat high during most of the cleaning, due to the disturbance of vacuuming and wiping. The counts spiked when Betsy & Travis entered BSC1, but they dropped back to “normal” background levels in a few minutes. What seemed to lower the particle counts significantly was having the top half of the soft cover open. One data point does not make a trend, but this is something to keep an eye on.

Location				                 0.3	0.5	1.0
West side cleanroom cover on		14	4	2
In chamber Cover on			202	96	16
In chamber cover on +5 minutes	88	40	13
In chamber cover top half open	3	1	1
After vacuum cover on			339	182	36

East side cleanroom cover on		0	0	0
In chamber cover on			222	126	22
B&T in BSC1 cover on HAM3		668	435	101
In chamber cover on +5 minutes	286	161	29
In chamber cover top half open	17	13	9
After vacuum cover on			74	42	17
After wipe down cover on             	421	216	47

West side cleanroom cover on		32	19	3
In chamber cover on			251	143	37
In chamber cover top half open	37	16	6
   Betsy & Travis exit BSC1 during the west side wipe down
After wipe down cover on	         	340	182	34
After wipe down cover on + 10 min  115	70	16