Richard Pardo Argonne National Laboratory ATLAS Operations ATLAS User’s Meeting August 14, 2009

August 14, 2009 ATLAS User’s Meeting: ATLAS OperationsR. Pardo 2 Outline ATLAS Operations Facility Current Status and Performance –Operating statistics –Beams available and properties –Operations schedule and staff Recent and In-Progress Improvements –In-flight RF Sweeper –Energy Upgrade Project –CARIBU will be discussed in separate presentation Future Accelerator Facility Improvements –ARRA AIP-funded projects –Proposed ATLAS Efficiency and Intensity Upgrade (separate presentations)

August 14, 2009 ATLAS User’s Meeting: ATLAS OperationsR. Pardo 3 ATLAS: A National User Facility for Low-Energy Heavy-Ion Research World’s First Superconducting Accelerator for Ions 1 ECR Ion Source on HV platform In-Flight RI Beam Production Gas Cell Energy Upgrade Cryostat CARIBU HELIOS

August 14, 2009 ATLAS User’s Meeting: ATLAS OperationsR. Pardo 4 ATLAS Delivered Beams for FY Different Isotopes *11.6%(650 hours) of beam time for Exotic Beams

August 14, 2009 ATLAS User’s Meeting: ATLAS OperationsR. Pardo 5 ATLAS Standard Stable Beams The list of ‘standard beams’ has been recently updated on the ATLAS website. The data now listed reflects: 1. New Energy Upgrade Cryostat 2.Continued improvements in source performance and transmission. 3.If your experiment needs a different beam or better performance, contact me.

August 14, 2009 ATLAS User’s Meeting: ATLAS OperationsR. Pardo 6 Rare Isotope Beams at ATLAS ATLAS History of In-flight Radioactive Beams IN FY2008 –In-Flight Radioactive Beams: 11.6% of beam time (650 hours)

August 14, 2009 ATLAS User’s Meeting: ATLAS OperationsR. Pardo 7 ATLAS Radioactive Beams Provided The list of ‘radioactive beams’ developed so far by the ‘in- flight’ or ‘batch’ method is also listed on the ATLAS website. These beams have been developed for the spectrograph beamline so far. Development of beams to HELIOS is now possible. 12 B has been provided to HELIOS for research so far. No RF sweeper is available for HELIOS at this time to improve beam purity.

August 14, 2009 ATLAS User’s Meeting: ATLAS OperationsR. Pardo 8 Statistics of ATLAS Performance 6-day operation resumed in February, day operation started in the week of July 6. – For FY09, we now project ~5100 Joule hours. – CARIBU and Energy Upgrade commissioning reduce research time. CARIBU operation will allow two parallel experiments for first time A new measure of performance provided by users indicate 91% availability compared to schedule research hours. † Joule operating hours = Research + Accel. Devel. + Tuning

August 14, 2009 ATLAS User’s Meeting: ATLAS OperationsR. Pardo 9 Measures of ATLAS Performance Facility Time Distribution In FY % of calendar time for research/beam studies 77% of staffed hours for research 5% of available time is Research Downtime

August 14, 2009 ATLAS User’s Meeting: ATLAS OperationsR. Pardo 10 ATLAS System Reliability  Maintenance is vital to successful operation  High reliability → maximum research hours  329 hours of lost research time in FY2008  Tracking failures focuses our maintenance and development efforts  Replacement/upgrade of aging systems maintains operating reliability. Specific Maintenance & Improvement Programs Replaced all RF Amplifiers (3 years) Replaced Shift Log software with new system Installed new electronic bulletin board Start replacement of bipolar steering magnet power supplies

August 14, 2009 ATLAS User’s Meeting: ATLAS OperationsR. Pardo 11 ATLAS Staff Levels ATLAS now has 6 trained operator and –Lead Operator –Operations Supervisor The ATLAS Operations staff now totals 23 persons –Plus support from the Accelerator Development group (6) In addition there are 9.5 FTEs spread over 12 people providing support to the ATLAS research program. For most of 2008, ATLAS operated on a 6-day schedule (with occasional seven-day operation as required by experiment needs). The FY09 final budget allowed ATLAS to return to 7-day operation. Seven day operation began in July Two new CARIBU positions added for beam development/operation –Dedicated technician (not yet filled) – Post-doc

August 14, 2009 ATLAS User’s Meeting: ATLAS OperationsR. Pardo 12 Priorities for Upgrades & Developments Our overarching goal is to maintain ATLAS as the nation’s premier low-energy heavy-ion research facility. CARIBU will greatly expand our RIB capabilities. –Emphasizes need for improved total efficiency (ATLAS Intensity Upgrade) –Increased beam energy for inverse reaction studies (Energy Upgrade) –Better diagnostics (AIP LEBT improvements this year) In-flight radioactive beams with properties not readily available at other facilities (energy, yield, beam quality) (RF Chopper) Stable beams will continue to play an important role –Increased beam intensity – often with expensive, low-abundance isotopes. – 50 >300 pnA on target –Reduce source contamination with solids for AMS studies –(Laser ablation of solid materials into ECR & other source improvements) Developments at ATLAS seek to improve performance in these areas, enhancing the features most in demand.

August 14, 2009 ATLAS User’s Meeting: ATLAS OperationsR. Pardo 13 ATLAS In-flight Radioactive Beam Production RF Chopper to remove primary beam tails First operation in February Now available for ‘routine’ operation. Second unit for HELIOS under consideration. 10 C In-flight Production from 10 B Primary E-residual Chopper OffE-residual Chopper On 10 C B B 4+ 9 Be 4+ B/C Discrimination factor ~ 200

August 14, 2009 ATLAS User’s Meeting: ATLAS OperationsR. Pardo 14 ATLAS Energy Upgrade Project is Online New ATLAS Cryostat 109 MHz QWR Cavity ß s = Length = 25cm ATLAS Energy Upgrade replaces the last ATLAS cryostat with: New cryostat containing New classes of resonators: 7 ß=0.14 quarter-wave resonators Off-line Test

August 14, 2009 ATLAS User’s Meeting: ATLAS OperationsR. Pardo 15 ATLAS Energy Upgrade Project Installation ATLAS high energy beamline reconfigured in March First offline resonator tests May Fields as high as 15 MV/m Cryostat installed in beamline, Week of May 25, Photo Album Photo Album First beam acceleration at low fields July 2, Full operation : July 21-24, C beam to (20.1MeV/u) Average accelerating field: 8.3 MV/m Need split-ring resonator repair 5 Split-ring resonators not operating limit total energy. Repairs for some in January 2010.

August 14, 2009 ATLAS User’s Meeting: ATLAS OperationsR. Pardo 16 New projects to enhance ATLAS capabilities Accelerator Improvement Projects (AIP)  PII & CARIBU LEBT Improvements - $200k (FY2009) – Additional beam diagnostics – emittance. – Additional weak beam diagnostics – tape station. – CARIBU beamlines to the CPT and laser atom trap facility – Later: Electrostatic Optics (mass independent) design.  ECR Laser Ablation for AMS and Solids - $970k (FY ) – Funding: New 3-year ARRA Actinide AMS proposal – Improved efficiency and intensity of ECRIS with solids. – Important for rare stable isotopic materials – Accelerator Mass Spectroscopy – reduce sample cross-talk – Builds on past experience with lower power NdYAG laser.  ARRA AIPs : First Phase of Energy & Intensity Upgrade – $9800k for FY in two projects – a) New RFQ Linac replaces the first PII cryostat – b) New λ/4 resonators and new cryostat to upgrade booster linac and improved helium plumbing for cryostat

August 14, 2009 ATLAS User’s Meeting: ATLAS OperationsR. Pardo 17 ARRA AIP projects to enhance ATLAS capabilities FY2010/2011/2012 AIP Improvements  New PII RFQ Replaces First(α) PII Cryostat - First three resonators in PII have poor capture of beam - Approximately 1/3 of beam lost at this stage - By far, largest single loss point in facility - Important CARIBU beam improvement - Also better for high intensity stable beams - Funding:  ARRA AIP $4550k - An important first step in the overall ATLAS Energy & Intensity Upgrade

August 14, 2009 ATLAS User’s Meeting: ATLAS OperationsR. Pardo 18 Other AIP projects to enhance ATLAS capabilities FY2010/2011/2012 AIP Improvements  Replace First Booster Cryostat & Helium Plumbing - Replace at leastoneexisting low-beta split-ring resonator cryostat with new, top-loading box cryostat design - Improved resonator cooling → Improved field performance - Cleaner resonator surfaces → Improved field performance - New ß=0.07 resonator required - Improved cryo insulation - New helium distribution system for new cryostat - Funding:  ARRA AIP funds of $5320k - A second step in the overall ATLAS Energy & Intensity Upgrade

August 14, 2009 ATLAS User’s Meeting: ATLAS OperationsR. Pardo 19 Equipment Schedule & Funding CARIBU PII RFQ AIP Funding PII & CARIBU LEBT/ Diag. Laser Ablation (AMS- funded) ARRA Funding Booster Cryostat Replacement EBIS Charge Breeder (funding not certain) SRF Test Facility

August 14, 2009 ATLAS User’s Meeting: ATLAS OperationsR. Pardo 20 Summary ATLAS continues to perform at a high level of productivity Some loss in research time this year and next required for installation and commissioning of Energy Upgrade Cryostat and CARIBU Current budget has allowed: ATLAS to return to seven-day operation in July Add staff to focus on CARIBU and electronics development activities Energy Upgrade Project Cryostat is now fully operational CARIBU commissioning will take place near the end of summer ARRA Funds allow the start of a major efficiency and intensity upgrade.