Chris Adolphsen

Department Programs International Linear Collider (ILC) –All ILC areas except for ATF2 (APE and Test Facilities) FNAL Project X –L-band CW (650 MHz) and Pulse rf (1.3 GHz) sources, … LARP –Rotatable Collimator –UA9 Crystal Collimation –… SuperB –IR Design –Ring RF –…. X-band –CLIC Structure Tests –X-band Gun Development –X-band Linac Driven Light Sources (MEGa-ray, MaRIE, …) –…. Support for FACET, LCLS, Controls Upgrade, …

Klystron Cluster Scheme Tests Resonantly power a 0.5 m diameter, pressurized (1 atm N2), 10 m long aluminum pipe to 300 MW TE01 mode field equivalent in 1 ms pulses

Time of Position 2 markers (T1,T2) are ~ 1 ms later than those from Position 1, which suggest events are much closer to Position 1 (5 m / 5100 m/s ~ 1 ms) T1 T2 Acoustic Sensor Breakdown Localization CTO KW input power yields 300 MW equivalent surface fields in the pipe - see bkd every ~ 15 hours, maybe from CTO or upstream – rate seems very pressure dependent ‘Big Pipe’ Operation

Next: 160 m Resonate Ring

Status of ILC e- Source Laser System Development Two similar laser systems are being developed: 1.SLAC design 2.SBIR laser system (KM Labs) Both systems share similar challenges –CW amplifier pump lasers KM Labs system has been operational at 1.5 MHz at KM Labs facility  inspected in October 2010 Delivery in December 2010 KM Labs and SLAC systems are now in the process of installation at SLAC’s ILC ITF After KM lasers running at 1.5 MHz, will do a gun test and then augment the PI pumps with the Coherent lasers to bring the KM system up to 3 MHz

KM Labs System Installation Top Left: JohnS at KM Labs in Boulder, CO in October Top Right: the laser being brought into B006 in December Bottom: the laser on the table in Rm 107, B006 wherein we have tested the Photonics Industries (PI) green pump lasers. One of these work, one of these has low output.

Gun Development at JLab Inverted Insulator Cathode Anode NEGs and Ground Screen Anode Feedthrough JLab's Inverted gun design Conditioned to 150kV without observed field emission

ILC DR Electron Cloud Working Group Tasks & Status Reduced DR Circumference – ILC Low Power Scenario Evaluation of reducing the DR circumference to one-half that specified for the RDR Corresponding reduction in bunch count to one-half of the RDR specification Baseline Mitigation Recommendation Evaluation of EC Mitigation R&D Results Identify the most promising mitigation schemes Identify candidates and issues for further R&D Restored Bunch Count Evaluation of options to restore the RDR bunch count for high luminosity operation Identify safe path to restore bunch count Evaluate performance limits in low power configuration March 2010 October 2010 Under Evaluation Participating Institutions: ANL, Cornell, INFN, KEK, LBNL, SLAC Working Group coordinated by SLAC (M.Pivi).

Electron Cloud Mitigation Options 10 Clearing Electrodes KEKB Grooves w/TiN coating Clearing Electrode C ESR TA Grooves on CuAfter extended operation Stable Structures Reliable Feedthroughs Manufacturing Techniques & Quality

Lanfa Quadrupole Region Evaluation for the 3.2km DR for Possible High Current Operation Need SEY~1 or better in quadrupoles with short bunch spacings Need to understand antechamber role CLOUDLAND simulations (L.Wang, SLAC) ECLOUD10 Workshop

MDI Work in Progress Hall Design, Detector & Platform Vibration Analysis, “R20” Package w/ QD0 mover system, Frequency Scanning Interferometry Alignment

First Simulations of a Network of Launch Points and Retroreflectors for QD0 K. Riles – U. Michigan

Vibration Measurement System to Support ILC MDI R&D: Testing on the SLD Detector Andrei Seryi’s old vibration measurement system has been resuscitated Custom battery-operated preamps have been built System noise level is very low: ~0.25 nm RMS (integrated power > 1 Hz)

SLAC Rotatable Collimator for LHC Ratchet Gear Drive RC-0 Jaw (copper) RC-1 Jaw (Glidcop) LHC IR7 Style BPM Buttons 4 per end LHC IR7 Style BPM Buttons 4 per end Flex Support Tank geometry allows a 60mm facet-to-facet gap in fully retracted Jaw position Tank geometry allows a 60mm facet-to-facet gap in fully retracted Jaw position Ferrite could mount to Base Plate facing Jaw facet Ferrite could mount to Base Plate facing Jaw facet BPM assemblies at each end are fiducialized to Collimator Base Plate Drive Mechanism RF foils carry image current and shields Rot. Mech.

Status In Q1 FY11, mechanical work included the rebuild of the RF rotation mechanism on one of the jaws and the final reassembly/rebuild of the drives with W-S2 coated bearings. The new design was tested to x5 anticipated torque required for rotation. The four bellows were vacuum fired and welded on. Leak checking showed 9-scale vacuum.

Current Near Term R&D Plan Ship first rotatable collimator prototype to CERN ASAP Mechanical, vacuum & impedance tests by CERN personnel Installation in SPS during technical stop of LHC  Location identified Beam tests of prototype in SPS in early 2011  Impedance  Operation Robustness tests in HiRadMat Facility ~ Summer 2011: 1 MJoule per accidental beam-abort  Test extent of damage: molten & gaseous debris, hit face, adjacent face..  Permanent shock induced deformation of jaw  Operation of rotation drive & integrity of water circuits after impact(s)

SuperB Interaction Region m Developed a scheme for solenoid compensation that involves rotating the PMs as well as cancelling the detector field as much as possible Recently, an orbit and skew correction scheme was developed to enable the machine to run with the detector field off using the same compensation hardware

Non-RF Bunch Linearizer for a All-X-Band Linac Yipeng Sun

Simulations for 250 pC Bunches BC1:over-compressBC2:under-compress Yipeng Sun

Use of Truncated Gaussian Laser Profile to Reduce LCLS Emittance Can improve LCLS projected and slice emittance 20%+ It is supported by theoretical analysis - space charge forces are more linear in the Gaussian-cut case. Scheduled to LCLS beam verification in late February.  x/r=0.5  x/r=1.0  x/r=10 F. Zhou, P. Emma, and Z. Huang