1. Update on GEM-Digital hadron calorimetry Andy White U.Texas at Arlington Jan 19, 2006

2. Topics - 30cm x 30cm GEM chamber update: - Foils - Frames, transfer jig - Anode board - Preamp testing - TGEM alternative - Local UTA logistics - MRI

3. First 30cm x 30cm 3M GEM foils - Continuing foil certification - Foils sent to La. Tech. U., U.Victoria, and Changwon U. and about to be sent to U.Washington, Tsinghua U.

4. GEM foil frame transfer/mounting jig

5. - Frames produced at Fermilab on Thermwood - Now have enough frames in hand to make the planned 5 30cm x 30cm GEM chambers FR4 frames for mounting foils

6. Anode board for 30cm x 30cm chamber - Some issues with making the boards – solder-coat application - shorts between some pads – will fix by hand for now. - components are in hand for mounting preamp cards.

7. “Thick-GEM’s” - TGEM’s made by standard drilling of PCB, including removal of O(100µm) around hole to allow higher voltage use. - Now evaluating samples from A.Breskin – Weizman Inst.

8. HV 50M 25M -3000V -2500V -500V 0V Cath. Top Bottom. Pad Thick-GEM operating setup - Use of single TGEM to replace double-GEM may save radial space in active layer.

10. Front-end card (BES III) for 30cm x 30cm