Micro Patterned Gas Detector Development
Group at Purdue University

GEM Assembly

A pdf document for the stretching procedure can be obtained by clicking here

Streat

note	note	note

Stretching Process

	The unstretched GEM.
	The unstretched GEM and acrillic frame that will be used to help stretch the GEM.
	The unstretched GEM is placed on top of the acrillic frame and centered.
	Kapton tape is applied around the edge of the GEM to secure it to the frame.
	A second frame is added to the top of the essembly and attached to the lower frame with screws to clamp the GEM between the two frames. Finally, the essembly is placed in the oven at 50 degrees celsius for twenty minutes to initially streatch the GEM.
	While the GEM is being initially strectched, the G-10 frame to be attached to the streatched GEM is prepared. The G-10 frame will be secured to the GEM with adhesive.
	A small amount of adhesive is applied around the edge of the G-10 frame.
	The G-10 frame is placed on the baking sheet, adhesive up, ready to be attached to the initially streatched GEM.
	The essembly is now removed from the oven and has been initially streatched.
	After removing the essembly from the oven, it is placed on top of the G-10 frame. The essembly will now be placed back into the oven for curing and final strechting.
	The essembly is secured to the baking sheet.
	The essembly will remain in the oven for 1 hour and held at 50 degrees celsius.
	After 1 hour, the essembly is removed from the oven and is disassembled in reverse order.
	First, the top frame is unattached. Then the kapton tape is removed. Finally, the edges of the GEM will be trimmed back flush with the attached G-10 frame.
	The stretched GEM and attached G-10 frame.