ATF Science Planning Workshop Facility Upgrade Thrusts Chris

ATF Science Planning Workshop Facility Upgrade Thrusts Chris Cullen, ATF Upgrades Project Manager October 15, 2019 The Accelerator Test Facility

Topics ATF CO2 laser configuration ATF CO2 laser upgraded configuration CO2 amplifier upgrades In-vacuum CO2 laser upgrades ATF Ebeam configuration ATF Ebeam upgraded configuration EH Comparison Ebeam upgrades summary CPA NLPC Flexible polarization rotator Circular polarization Beamline 2 Accelerator Test Facility

Ion Chamber Plasma Shutter Final Amplifier CPA Vacuum CO2 laser transport Present CO2 Laser Vacuum Transport Accelerator Test Facility

Circular or Linear Polarization Mirror Flexible Polarization Rotator Proposed NLPC Development Final Amplifier from B912 CPA Vacuum Transport from CPA to BL1 and BL2 shown Vacuum Transport to BL2 CO2 Laser Vacuum Transport Accelerator Test Facility

New Final Amplifier & Output Window Final amplifier and end caps in B912 Gain from: 40% increase in volume 40% pressure increase (116 to 162 psi) Peak fluence on window limits output Window viewing area can be doubled (i.e. energy output can be doubled) Window structural analysis already performed End cap to be modified for new window Downstream optics require evaluation to verify peak power adequacy Amplifier can be prepared offline in parallel with ATF operations in the B912 clean room Installation requires re-opening a wall section Accelerator Test Facility

CPA in Vacuum Chamber Vacuum chamber Preliminary design & analysis complete Mirrors and gratings vibration isolated Breadboard mounted to concrete footing Bellows Concrete footing Front panel hidden for clarity Vacuum chamber supports Accelerator Test Facility

Flexible Polarization Rotator Provides linear polarization control Rotation range -2 to 92 Procurement in progress In vacuum configuration planned Accelerator Test Facility

Additional Proposed In-Vacuum Capabilities NLPC To provide sub-ps pulse compression Circular polarization Dedicated chamber supporting mirrors for linear, CW, & CCW polarization Mirrors switched out to support the required polarization CO2 laser vacuum transport to BL2 Accelerator Test Facility

ATF Experimental Hall as Presently Configured Beamline 1 Experimental stations Deflector cavity Beamline 2 Experimental stations Accelerator Test Facility

ATF as Presently Configured Beamline 1 Experimental stations Accelerator sections Reconfigure this region for stronger bunch compression Deflector cavity Photocathode gun Beamline 2 Experimental stations 10 Accelerator Test Facility

Planned BL Configuration Spectrometer arm & spectrometer added to BL1 Proposed Slit & Transverse Deflection Cavity (TDC) Existing Accelerator Test Facility

EH Comparison Current Configuration Planned Configuration Accelerator Test Facility

Experimental Hall Upgrades Summary Slit and Transverse Deflector Cavity already on BL2 Slit improves spectrometer image TDC for beam diagnostics Slit and Transverse Deflector Cavity planned for BL1 Spectrometer planned for BL1 Provides spectrometer images for all experiments Shielding and hall access needs to be reconfigured to allow for this capability In-vacuum CO2 laser transport planned for BL2 LINAC reconfigured for stronger bunch compression Accelerator Test Facility

Thank you! Questions or Comments? Accelerator Test Facility

Backup Accelerator Test Facility

Shielding and Access Accelerator Test Facility

ATF Experimental Hall as Presently Configured Accelerator Test Facility

Planned Accelerator Test Facility

The Accelerator Test Facility

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