Elementary Electromagnetic Particle Physics The Atlas Project

Cleaning of the Components of FCAL1 Module Zero

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The constuction of FCAL1 Mod 0 began with the cleaning of the components. The smaller components-the kapton washers, brass washers, signal pins, and sockets- were cleaned ultrasonically with a mixture of LPS Precision Clean and water, followed by a water rinse and ethanol soak [both also in the ultrasonic table top tank].

LPS Precision Clean and Citranox cleaners were used to clean the larger copper components- the rods, the tubes, and the matrix plates. Batches of 100 rods or tubes were cleaned in the "kitchen". The procedure was as follows:

• 1 hour soak in the Citranox/water mixture at a ratio of 1:50
• 1 hour ultrasonic clean at 80kHz in the LPS/water mixture at a ratio of 1:4
• Rinse in water
• N2 dry for the tubes
• Ethanol soak for both the rods and the tubes
• Bagged until use
  The same procedure was used for the matrix plates, although they were cleaned in another room in a sink, utilizing the ultrasonic transducers. Once all the matrix plates were cleaned the assembly began in the clean tent.
  

  Photographic History of the Cleaning Process for FCAL1 Mod 0

  	The kitchen area where the rods and tubes were cleaned. Note the ultrasonic tank preceeded by Citranox tub and followed by the rinsing tub.
  	Another view of the kitchen where the rods and tubes were cleaned.
  	The copper matrix plate soaking the in Citranox/water mixture.
  	The copper matrix plate in the LPS/water mixture undergoing ultrasonic cleaning.
  	The copper matrix plate prior to the nitrogen dry
  	Chris Goldman, undergraduate student in EEPP, dries the copper matrix plate.

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