The mirror fix involves several elements: (1) Employ the spare BL13 M0 SiC mirror to replace the cracked BL10-1 M0 mirror. (2) Provide a fan allocation mask to create a shadow between the BL10-2 centerline acceptance and the BL10-1 off axis acceptance and limit the BL10-1 mirror acceptance to 1.0mrad. (3) Design and fabricate a new vacuum system and mirror mover such that the existing mirror can continue to operate (poorly) until the new system is installed. Deliverables: (1) Design package, travelers, etc in time to fabricate, process, assemble, and install mirror system and associated mask during the December 2013 shutdown. (2) Archive above drawing package (model, drafts, and images). (3) Fabrication problem resolution, assembly, installation, and alignment oversight. Boundary Conditions: (1) The revised system shall employ the 40mm x 20mm x 360mm SiC replacement mirror per SSRL engineering note M547 (attached). (2) The BL5-2 M1 mirror system (see SA-451-409-00) provides a reference design as a departure point for the mirror system design. (3) The mirror cooling shall use the updated heat exchanger system consisting of a water cooled copper rail – Si pad (PF-451-409-26) mirror body circuit with the thermal contact between elements provided by a – 0.05mm GaIn layer. The BL5-2 M1 mirror system heat exchanger (SA-451-409-01) provides a reference design. (4) The mirror system shall include a Compton mask if feasible to minimize the diffuse secondary power absorbed by the vacuum chamber walls. (5) The mirror system and associated mask must fit into the space between the BL10 injection stopper system (item 2, AD-441-146-00-c6) and the downstream mask (item 5, AD-441-146-00-c6). The reflected beam axis must remain the same as the existing system. Provided the mirror and mask are independently positioned, the vacuum system can be connected directly to the injection stopper tank without intervening bellows. A bellows shall be included between the mirror vacuum system and the downstream mask.
The mirror fix involves several elements: (1) Employ the spare BL13 M0 SiC mirror to replace the cracked BL10-1 M0 mirror. (2) Provide a fan allocation mask to create a shadow between the BL10-2 centerline acceptance and the BL10-1 off axis acceptance and limit the BL10-1 mirror acceptance to 1.0mrad. (3) Design and fabricate a new vacuum system and mirror mover such that the existing mirror can continue to operate (poorly) until the new system is installed. Deliverables: (1) Design package, travelers, etc in time to fabricate, process, assemble, and install mirror system and associated mask during the December 2013 shutdown. (2) Archive above drawing package (model, drafts, and images). (3) Fabrication problem resolution, assembly, installation, and alignment oversight. Boundary Conditions: (1) The revised system shall employ the 40mm x 20mm x 360mm SiC replacement mirror per SSRL engineering note M547 (attached). (2) The BL5-2 M1 mirror system (see SA-451-409-00) provides a reference design as a departure point for the mirror system design. (3) The mirror cooling shall use the updated heat exchanger system consisting of a water cooled copper rail – Si pad (PF-451-409-26) – mirror body circuit with the thermal contact between elements provided by a 0.05mm GaIn layer. The BL5-2 M1 mirror system heat exchanger (SA-451-409-01) provides a reference design. (4) The mirror system shall include a Compton mask if feasible to minimize the diffuse secondary power absorbed by the vacuum chamber walls. (5) The mirror system and associated mask must fit into the space between the BL10 injection stopper system (item 2, AD-441-146-00-c6) and the downstream mask (item 5, AD-441-146-00-c6). The reflected beam axis must remain the same as the existing system. Provided the mirror and mask are independently positioned, the vacuum system can be connected directly to the injection stopper tank without intervening bellows. A bellows shall be included between the mirror vacuum system and the downstream mask.
en_m693r0_bl10_1_mirror_fix_sow.docx