EA ALMA Future Development

Daisuke Iono (NAOJ)
2017 ALMA/45m/ASTE Users Meeting

Background0• The ALMA Development Program supports thecontinued development and upgrades of hardware,software, and analysis tools for the ALMA project.
• Until now these funds have been used mainly tocomplete the complement of receiver bands.
• It is timely to define a new long-term development
strategy for the upcoming decade and beyond, thatwill guide further advancements in ALMA’s technicaland scientific capabilities.

• As a first step, the ALMA Science Advisory Committee(ASAC) examined potential technical developments for longterm ALMA development (“ALMA 2030” report).
• ASAC recommended, with no specific priority,
1. Improvements to the ALMA Archive: enabling gains inusability and impact for the observatory
2. Larger bandwidths and better receiver sensitivity: enabling
gains in speed
3. Longer baselines: enabling qualitatively new science
4. Increasing wide field mapping speed: enabling efficientmapping.

EA ALMA Development Workshops
Output: three EA led projects/studies

2011
Development WS

2013
Development WS
2014
ASTE/ALMA
Development WS
2015
Antenna Structure
Development WS

2016
Development WS2017
Long Baseline WS(Kyoto, Oct 3-5, 2017)

Band 1

Artificial Calibration Source

Band 11Output: New science demands for ALMA
Angular Res.
Fidelity
FOV

Sensitivity

Wide IF

Output: Science requirements, ASTE/ALMA dev timeline
Multi-beam

THz

TES Cam

Wideband Spectrometer

Output: Antenna Cost vs performance

http://almaintweb.mtk.nao.ac.jp/~diono/meetin
gs/EA_Development_Meeting/
http://almaintweb.mtk.nao.ac.jp/~diono/meetin
gs/ASTE_ALMA_2014/

http://almaintweb.mtk.nao.ac.jp/~diono/meetin
gs/NRO_ALMA_2015/

Output: Software/Calibration strategies and demands

http://almaintweb.mtk.nao.ac.jp/~diono/meetin
gs/NRO_ALMA_2016/

Output: AIs for long baseline testing. Need to identify solid science case.

http://almaintweb.mtk.nao.ac.jp/~diono/meetin
gs/longBL2017/

Long Baseline Workshop• Scope:– Review the high-resolution ALMA science results to date
– Identify detailed science cases for future baseline expansion– Discuss the scientific and technical requirements such as angularresolution, number/size of antennas, sensitivity and operationalfrequency– Review the technical feasibility studies for longer baseline imaging

SummaryLong Baseline Workshop••

Output: Good kick-off meeting with excellent science/technical presentations
Action Items– Science cases need to be updated as we get long (16km) baseline images– What is the killer science for 30-50km BL?
– Need more long baseline tests (OSF-AOS)– Investigate image quality/fidelity at long BL– Calibration strategies (e.g. dry component, B2B transfer) need to beinvestigated further– Explore the possibility of writing a white paper (that includes a roadmap)

Priorities for EA• Studies & Small Projects– ALMA Calibration Source• Polarization calibration at bands 3,6,7– High Critical Current Density (Jc) SIS Junction Device
Development (including wideband RF/IF and THz devices)– GPU Spectrometer for TP array (with KASI)• Supplements the ACA correlator• Projects– Band 1 project (lead: ASIAA, Collaboration: NAOJ, U of Chile,
NRAO, HIA)
• Baseline capability (35-50GHz)• ASTE development project (but extendable to ALMA)– Multi-beam receiver (with KASI)