A vaginal plethysmograph system utilizing an indirectly (reflected) lighted photocell probe has been developed and used experimentally with excellent results. While the standard lamp and photocell plethysmograph using transmitted light is not unique, its application in measuring vaginal blood volume presented numerous instrumentation and mechanical problems not previously encountered. It is believed that this is the first system to reliably measure vaginal blood volume changes by indirect methods.

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Throughout the construction phase of the cold mass for SSC magnecs, electrical tests are made to determine that no faulrs in the coil structure have developed. These tests include ones designed to measure turn-to-turn voltage hold-off, hypot tests to ground, coil resistance, and instrumentation checks. These various tests will be described and the cest parameters that are used will be covered.Electrical tests are performed throughout the magnet assembly and fabrication process to verify that coil integrity and insulation quality of the various components and sub-assemblies are within nominal limits. These tests are also required to certify each dipole for SSC acceptance before it is installed in the cryostat and leaves the factory for final installation. The following series of tests, which are conducted at room temperature, are listed below.• Resistance • Inductance and "Q" • Insulation • Impulse • Ratiometer Resistance TestsResistance measurements are performed using a one ampere (usually) precision constant current power supply and measuring the resultant voltage drop across the element under test. This is analogous to a four-wire ohmmeter. This test is easy to perform and is uncomplicated. The maximum output voltage required from the power supply is less than ten volts.The main coils are connected in series as per the final wiring configuration, and, with the one ampere current flowing in the coils, the voltage drop across each coil is measured and recorded. The DC resistance test will usually indicate a turn-to-turn short. However,

The developmentof the basic requirements for the mm-to-mm, coil-to-coil, g , _. _ o _ _ _ '_"_, and coil-to-ground insulation for SSC dipoles is discussed. The insulation method