Hi Jenisha

Question that I am interesting based on (page 481 book by Boris Chertok reference http://history.nasa.gov/SP-4110/vol3.pdf in Russian version it is better to read but anyway):

"During Molniya-1’s third and subsequent spaceflights a rapid degradation

of the photovoltaic converters (FEP) was detected.(33) It was the manifestation

of a little known effect of irradiation when passing through near-Earth

radiation belts. Another factor affecting the performance of the solar arrays

was thermal cycling—a temperature differential from plus 120 degrees in the

Sun to minus 180 degrees in the shade during each orbit.

In 1966, to reduce degradation and extend the life of the solar arrays,

Lidorenko’s institute introduced a silica glass coating to the working surfaces

of the photovoltaic cells. We had to give in and increase the mass, but we had

some leeway there, thanks to the efforts of Dudnikov’s designers. Additional

solar arrays shaped like special pleated curtains were installed, which made

them heavier. When needed, the curtains opened and fresh elements that hadn’t

been harmed by radiation or thermal cycling were put into operation."

Because I do not have access to good solar cell – I need to presizley know how available to me cell will perform. According Boris Chertok in one month I can loose half of the power on a Lunar mission.

Thanks for information about Sensormetrix. They are out of my reach. I have to developed everything by myself.

Regards

Alex Dobrianski