Inverter box construction

Lewis Elliott and Phil Kasavan assembling the LISA inverter boxes. This work was done from approximately June 1 to July 10. There are 18 boxes in total, two for each of the 9 layers of the LISA array. The purpose of the inverters is to reverse the polarity of the photomultiplier dynode signals in order for the energy signals to be processed by the charge-to-digital (QCD) VME units.

Inverter boxes stacked before soldering (all but one); several front plates and ribbon cables

Lewis and Phil hard at work assembling the boxes and soldering the ribbon cables