Atacama Large Millimeter Array Science IPT Review

1. Atacama Large Millimeter ArrayScience IPT Review Bilateral Project Scientists: Al Wootten, (Lead) Tom Wilson, (Deputy) Ryohei Kawabe: ALMA-J Lead ALMA Cost Review

2. Overview • History – MMA Science group began formal life June 1998, • NA Group holds weekly (usually) telecons. • Joined with LSA science group June 1999. • Groups very dispersed but with centers in NAOJ, Garching, Cambridge, IRAM, Tucson, AOC and NAASC. • Pan-ALMA (including JP) telecons monthly. • Detailed agendas and minutes available on web of meetings since June 1998. ALMA Cost Review

3. Work Description • Charged with setting high level science specifications and requirements • Delivered high level Science Specifications and Requirements document • Continuing interplay with rest of project • Attend project reviews, often writing reports. • Make certain that these are transmitted to other IPTs • Check on flow downs and help develop alternatives, if needed • Set up meetings of ALMA Science Advisory Committees • Interaction with Management IPT, JAO, Board • ASAC-tending, as an ALMA Board Committee is a Project Scientist duty—dissemination of Reports, Agendas, Minutes • Regional Project Scientists tend regional SACs • ANASAC in North America • ESAC in Europe • JSAC in Japan • Community outreach • Development and dissemination of presentation material • Production and distribution of community reports, newsletters • Workshop development and execution ALMA Cost Review

4. R&D Involvement • Develop and commission calibration strategies for ALMA • Site characterization, design of weather stations for site • Corrections for phase fluctuations due to atmospheric water vapor • Description of Water Radiometer (WVR) and software for these corrections • Simulations including WVR and Fast Switching (FS) techniques • Amplitude calibration device assessment, with SE, FE IPTs • Design the ALMA configuration, with consultation from Management, SE, Site, Antenna IPTs • Design imaging strategies and simulators ALMA Cost Review

5. Commissioning • The JAO Project Scientist will commission ALMA as a scientific instrument with Science IPT resources • Experience gained by team at ALMA Test Facility working with SE, Computing, Antenna, FE and other IPTs • With JAO, SE and other IPTs, developing Commissioning Plan • Commences with arrival of third antenna to high site • Gradual handover to Operations staff • Deeply involved with development of the Operations Plan, with MIPT • Now providing ‘turno Project Scientist’ to the JAO in Santiago. ALMA Cost Review

6. Near-term Deliverables • Configuration: Extended configuration design • Strawman available, redesign planned to accommodate environmental concerns, road and fiber design • Draft delivered end of year, ground truthed (with Site IPT), then final early next year • Concern: availability of personnel should antenna complement further decrease • Requirements • Clarifications on major items as a result of System Requirements Review • Continuing discourse with other IPTs • Documents on subsidiary items under development: RF Membrane, Solar Filter, Quarter-Wave plate, Amplitude Calibration Device ALMA Cost Review

7. Near-term Deliverables (2) • The IPT will support Prototype System Integration activities at the ATF with evaluation of the prototype ALMA interferometer. • Begin implementation of the ALMA Calibration Plan at the ATF facility. • Further development of commissioning plan for Chile • Evaluation of ALMA Water Vapor Radiometer, to be installed on SMA • Mitigation plan owing to late availability of ATF • Uses two prototype instruments • Purchase, use of OSF weather station, purchase of instruments • Instruments defined (basically duplication of instruments commissioned at ATF already) • ICD with Site drafted, imminent submission ALMA Cost Review