Korea ALMA Project(http://alma.kasi.re.kr)

People working on the ALMA project

Korea-ARC Activities

1. Town meetings: SNU (23/March), KIAS (30/March), KASI (04/April)(SNU, 23/March,2017)(KIAS, 30/March,2017)(KASI, 03/April,2017)

Pub #2(first)+42(first)+4

Korea-ARC Activities

2. ALMA Summer School (21-25/Aug, 2017)• Where: Sibaeksan Observatory• Participants: 16 graduate students and postdocs• Contents: basics of the Interferometry lecture: ALMA Data reduction tutorial of calibration & Image using TW Hya data
: 5 group works using 5 different ALMA Archive Data

Lecture of the basics of the Radio Interferometry

5 groups works using the ALMA Archive Data

Korea-ARC Activities

3. East Asia ALMA Science Workshop 2017 (http://alma.kasi.re.kr/almakasi2017)• 27 – 29/Nov, 2017, Korea Astronomy and Space Science Institute• 100 participants• Encourage collaborations between the East Asia Astronomers
in ALMA Society

East Asia ALMA Science Workshop 2017 - Korea

Receiver Development• 2015-2019: ASTE single beam receiver covering 275-500 GHz• 2019-2020: ASTE multi-beam receiver• 2021-2024: ALMA multi-beam receiver• 2015-2018: ASTE, ALMA GPU Spectrometer

ASTE

1U 4 GPU Solution Extends Supermicro’s Leadership in Supercomputing Serve
GPU / Xeon Phi™ SuperServers Offer Superior Performance, Density and Efficiency

Supermicro Offers the Best Supercomputing
Servers

Supermicro Is the #1 Customer Choice forSupercomputing Servers

Supermicro continues to enable a highly scalable,energy efficient future for parallel computing with
our latest Green Supercomputing solutions.
Highlighting our expertise in maximizing computedensity, performance and power efficiency, ourlatest 1U SuperServer® supports up to four NVIDIAGPU or Intel® Xeon Phi™ accelerator cards and dualCPUs and is powered by our highest efficiency
redundant Titanium Level digital power supplies.

The Supermicro SYS-1028GQ is the clear winnerwhen compared with the Dell PowerEdge C4130,
primary rival in the 1U 4 GPU supercomputing semarket space. Supermicro’s superior CPU directconnect design optimizes signal integrity and airf
to eliminate the GPU pre-heating, PCI-E extension
cables, and re-drivers that add to the Dell systemcomplexity, cost, extra power consumption, andlatency. Power efficiency is further enhanced by f
redundant Titanium Level (96%+) power supplies
while the Dell system employs lower wattage pow
supplies with the potential for under-powering afully loaded system and degrading performance
when one power supply is unavailable. TheSupermicro SYS-1028GQ also supports up to 4x 2drive bays with fully redundant power supplies,
while the Dell system must eliminate one power
supply in order to add 2 additional 2.5” drive bay
The Supermicro system is unique in supporting
NVIDIA GeForce GPU cards which may be require
for certain customer applications.

The new Supermicro SYS-1028GQ-TRT supports up
to 4 NVIDIA® Tesla® K80 dual-GPU accelerators (upto 300W) or Intel Xeon Phi™ with a streamlined
layout architecture that enables PCI-E direct connect
for best signal integrity as well as elimination ofcomplex cabling, repeaters, and GPU pre-heat for
maximum airflow and cooling. The system also
supports dual Intel® Xeon® E5-2600 v3 processors(up to 145W), up to 1TB ECC DDR4-2133MHz in 16
DIMM slots, front 2x 2.5” hot-swap SATA drive bays
plus 2x 2.5” internal drives, dual 10GBase-T ports
and intelligent, redundant 2000W (1+1) Titanium
Level high-efficiency power supplies. Thisarchitecture allows the SYS-1028GQ-TRT to operate
at high ambient temperatures, allowing customers
to save significant TCO (Total Cost of Ownership) andestablishing a best-in-class solution for the widest
range of customers’ supercomputing challenges.

ASTE

12m array

ALMA

total power array

ALMA

Compact array

Figure 1: SYS-1028GQ-TR(T) with 4 NVIDIA GPU cards
Page 1 of 2Feature
Direct CPU
connection forlowest latencyand power
consumption
Front 2x 2.5”
Hot-swap andinternal 2x 2.5”
drive bays
Active GeForceGPU support
High Energy
Efficiency PowerSupplies
35°C Ambient
Temperature
Operation

Supermicro
SYS-1028GQ-TR(T)

DellPowerEdge

Yes

Requires e
re-driver cand cab

Yes

No(Sacrifices 1for 2x 2.5”

Yes
2000W fully
redundantYes

No1600W redu
when no ho
HDDs inst
No(Conditionaambien

Table 1: Competitive Comparison© 2015 Super Micro Computer, Inc.

July

Korea-ARC Activities (Instrument development: frontend)
1. KASI 275-500 GHz feed horn
• Cross-sectional profile designed to meet
① -30 dB cross-polarization② -23 dB returned power③ > 80% aperture efficiency with 2 mirrors when coupled to the ASTE telescope optics
S11corrugations view

Cross polsimulated performance (without WG transition)

Measurement status• fabricated horn (direct-machined by Kawashima Kiko)on 1 port VNA measurement setup (325-500 GHz)
• 275-325 GHz measurement scheduled in early Jan. 2018

Korea-ARC Activities (Instrument development: Backend)

2. ALMA ACA TP Array GPU Spectrometer Preliminary Design Review (20-21/Feb, 2017)• Nov/2017: ASAC and ALMA Board approved the GPU spectrometer.

KVN & ASTE/ALMA TP (Total Power) GPU Spectrometer
KFFTSpec: data flow and functions inside GPU serverInternal synthetic
signal generator

Monitoring &Control Interface*

GPU #1
Stream 1

GPU #1
Stream 2

DMA

DMA

Time division
into Tint –length
slices of data

Unpack

UnpackPost-proc

Post-proc

Settings &schedule queue*
Command line
interface…

GPU #NStr. M-1

GPU #N
Stream M

DMA

DMA

…

Unpack

Unpack…

Post-proc

Post-proc

Spectralprocessing

Ring Buffer
containing >1 GByte oftime-stamped data frames

continuous dispatching to next idle GPU(s)Spectralprocessing

DRXP*
DTS receiverread

Spectralprocessing

Baseband filewrite

Spectralprocessing

10G/40G Net

De-framing

Alternate sources
for baseband data

Assembly of final auto/cross-power spectra and statistics* Required for ALMA/ASTE spectrometer, not present in KFFTSpec of 03/2016

Local or remote storage

Spectral power (uncalibrated)

GPU Spectrometer

Orion KL H2O
2016 March 15
22 GHz Yonsei

Velocity (km/s)

512 MHz bandwidth
32k channels
3.75 seconds avg.

Spectral Channel (N)Orion KL SiO
2016 March 15
43 GHz Yonsei

Velocity (km/s)

Spectral Channel (N)