1. Bigbite Frame Modification & Trigger Plane Bigbite Family Readiness Review Xiaohui Zhan MIT March 19, 2007

2. 1. Remove upper longitudinal beams2. Remove bottom beams3. Lower the slanted support beams New Frame SRC Frame 4. Add cross steal beams to mount the wire chamber 5. Remove auxiliary plane, reuse the beams in step 2 to construct the base 6. Add 4 new longitudinal beams 7. Add brackets to support the shielding

3. Connections are made using Kanya T blots, Mc master nuts and washers.

4. Order List: 1.100x100 Al EXTRUSION MA1-5-02-02/1050 x4 2.T BOLTS M8 A35-60 x20 3.T BOLTS M8 A35-20 x12 4.MOUNTING BRACKET A30-40 x4 5.MOUNTING BRACKET A30-00 x4 6.DOUBLE EXTRUSION NUT x12 7.UNIVERSAL CONNECTOR WITH BASE 50 A20-90 x12 Estimated Price: $736

5. E-E Trigger plane Consist of 24 scintillator bars Dimension 500x86x3 mm 3 ( E) 500x86x30 mm 3 (E) Further Particle Identification Within 1-2 month: test PMT with cosmic ray