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Center Independent Research & Development: GSFC IRAD

Development of stainless steel gas electron multipliers

Completed Technology Project

Project Introduction

We will develop gas electron multipliers GEMs) that are robust in negative ion gas to improve the sensitivity of X-ray Polarimeters.

We will develop a technique for fabricating GEMs that will both maintain the required spacing over arbitrarily large areas and be self-aligning. It will be based on separating two tensioned foils.

We will establish the foil tensioning technique and the optimum spacing between the foils. 

  • When the process is finalized, we will formalize the foil tensioning technique and measure creep, temperature stability and flatness using methods established for GEM testing.
  • Finally we will assemble a 3x7 cm2 GEM that will be integrated into a polarimeter and we will measure the gain uniformity over the area of the GEM.
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Anticipated Benefits

Primary U.S. Work Locations and Key Partners

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