ALMA-FED 2021: ALMA Front End Development (Virtual) Conference 2021

Contribution List

10. ALMA Band 6v2 Receiver Upgrade

Invited Talks

Invited Talk

Receivers (SIS)

We report on our proposal to develop an upgrade for the existing 211-275 GHz ALMA Band 6 receiver, referred to as “Band 6v2”, which complies with the strategies defined in the ALMA Development Roadmap to 2030 and with the recommendations of the ALMA Front-end & Digitizer Requirements Upgrade Working Group. The goal is to deliver an improved production-level receiver based on (i) a new Cold...

15. Broad IF band vs. Broad RF Band

Victor Belitsky

Invited Talk

Day 3: Receivers (SIS)
11:00 Wideband Technology development for ALMA receiver upgrades at NAOJ Takafumi Kojima invited
11:05 SIS based mixers development for radio astronomy Kirill Rudakov 6 contributed
11:10 On Extending the IF Bandwidth of ALMA Band # 6 SIS Mixers Marian Pospieszalski 6 invited
11:15 ALMA Band 6v2 Receiver Upgrade Alessandro Navarrini 6 invited
11:20 ALMA Band 6 Local...

4. Design of optical components

Invited Talks

Invited Talk

Arrays

Nowadays there is a considerable scientific interest in increasing the field of view of submillimeter wave observatories in order to enable a much faster wide field mapping. This would enable telescopes to survey large regions of molecular clouds and image nearby galaxies.
We present our study of multi-pixel architectures that could allow for orders of magnitude increase in mapping speeds,...

5. Development of a multiband heterodyne receiver with 49 GHz of instantaneous IF Bandwidth

Invited Talks

Invited Talk

Beyond 2030

Increasing the IF bandwidth in heterodyne receivers is one of the main priorities of the ALMA Development Roadmap. One alternative approach to this problem is to increase the number of IF outputs to achieve the same goal of reducing observation time. In this work, we propose the use of a multiband heterodyne receiver architecture in conjunction with digital sideband separation to achieve...

7. Development of a new wideband heterodyne receiver system (RF: 210–375 GHz, IF: 4–21 GHz) for the Osaka 1.85-mm mm-submm telescope

Invited Talks

Invited Talk

Receivers (SIS)

We report the development of a wideband receiver system using a corrugated horn covering 210–375 GHz (56% fractional bandwidth; Yamasaki et al. 2021, PASJ), wideband waveguide multiplexers (Masui et al. 2021, PASJ), and a wideband SIS-mixer with an IF (intermediate frequency) output of 4-21 GHz (Kojima et al. 2020, A&A). In the system, the RF signal from the horn is divided into two...

11. Development of receiver optics components using AM technology

Invited Talks

Invited Talk

Receiver optics

NAOJ is performing R&D studies related to additive manufacturing (AM) technologies based on metal 3D printing. This technology is evolving day by day in the world, both instruments and methods, and is used for diverse industries, e.g., aerospace, medical, automotive, ISS. Benefits of AM are rapid prototyping, design optimization with topology methods, cost and lead time reductions. We have...

13. Heterodyne Array Receivers for Space and Ground Based Applications

Invited Talks

Invited Talk

Arrays

Heterodyne array receivers have been successfully built for ground-based telescopes. Here we will present the first detailed design for a space application, the Heterodyne Receiver for the Origins Space Telescope (HERO). HERO follows the traditional design, but limited cooling power and the limited electrical power of the satellite pose major challenges. Minor challenges are limited...

6. NRC-HAA Cryogenic Radio Receiver Development

Invited Talks

Invited Talk

Receivers (MMIC/HEMT)

The Radio Instrumentation Team (RIT) team at NRC Herzberg in Victoria, Canada, is developing a dual linear polarization, cryogenic radio astronomy receiver covering the frequency range of 30.5 to 50.5 GHz for the next generation Very Large Array (ngVLA) project. The specification of this receiver development is aligned with ngVLA Band 5 requirements. This receiver is designed for a noise...

8. Preparing ALMA for the next decade and beyond

Invited Talks

Invited Talk

Introduction/Overview

ALMA continues to provide dramatic views into our cosmic origins and yet has the opportunity to capitalize on the technological developments over the two decades since its initial design to provide deeper, clearer, and more profound insights. Having defined its upgrade path for the next decade and beyond, ALMA is in the midst of finalizing the updated system and subsystem specifications for...

3. Sensitivity and a Wideband Metric for ALMA

Contributed Talks

Contributed Talk

Introduction/Overview

In this talk I will present a few overview notes on the kinds of sensitivity and imaging speed improvements in the front end receivers we can expect or hope for.