optical & infrared instrumentation effort in...

Optical & Infrared Instrumentation Effort in ASIAA

Shiang-Yu Wang (王祥宇)

Institute of Astronomy and Astrophysics

Academia Sinica

Growth of ASIAA

Future Large OIR facilities in China 2016/11/10

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Total number of ASIAA Faculty (including Research Scientists/Engineers) by Year

Total ofFaculty

ASIAA Instrumentation Projects •RADIO: SMA --- AMiBA --- ALMA --- GLT

•OIR: TAOS-1 --- CFHT/WIRCam --- Subaru/HSC

• TAOS-2 SPIROU PFS SPICA

(2003) (2009) (2012) (2016)

(2016) (2016) (2017) (?)

(2004) (2005) (2011)

2016/11/10 Future Large OIR facilities in China

Development Strategy • Develop the instrumentation capability rather

than build large telescopes considering the the budget and community size

• Collaborate with advanced telescopes with large aperture. – CFHT: WIRCam(2005), Flyeyes(2009), SPIRou(on going) – Subaru: HSC(2013), PFS(on going)

• Build small telescope systems – TAOS I (2005) & TAOS II (on going)

• Provide the access to the advanced optical/IR telescopes.


CFHT/SPIRou • Led by IRAP in Toulouse (Jean-Francois Donati) from 2009

– UoM, HIA, are major partners

– Brazil, Geneva, Portugal, ASIAA are minor partners


SPIRou Parameters • Single-shot 0.95-2.40 µm coverage

• Resolving power : ~70 000

• Short and long-term stability

– RV accuracy <1m/s

• Dual channel polarimeter, <1% crosstalk between states

• Peak throughput ≈15%, S/N=110 per 2 km/s in 1h for J=12, K=11

• Thermal background smaller than telescope+sky background

Future Large OIR facilities in China 2016/11/10

Our Contribution in SPIRou • Tip tilt and viewing camera

– Provide the correction signal to image stabilizer unit at 50Hz

– Targeted target star position error respected to the pickup mirror <0.05” during the exposures

– Based on a commercial camera with fast centroiding algorithm


Subaru collaboration

• Started from 2008 for the development of Hyper SuprimeCam – ASIAA is responsible for the filter exchanger unit,

CCD procurement & test, WFC test system

• HSC Hardware delivered to Hawaii in late 2012

• HSC started science operation in March 2014

• Prime Focus Spectrograph started from 2010 – ASIAA is responsible for the metrology camera

and most work of the Prime Focus Instrument



Superior Image Quality

HSC Survey (2014-2019) • Wide : 1400 square degree • Deep field: XMM-LSS, E-COSMOS, ELAIS-N1,

DEEP2-3 • UD field: SXDS/UKIDSS, COSMOS


Prime Focus Spectrograph


Key Parameters of PFS


ASIAA’s Role in PFS • Prime focus Instrument:

– Major structures, electronics, cameras

– System Integration and Test

– Control software

• Metrology camera

– The whole subsystem

• Software and hardware


Focal plane and Cobra motors


patrol dia. 9.5mm

q Stage (2.4mm)

f Stage (2.4mm))

PFI components Cable wrapper

optical bench and field element

Fitting tests Telescope interface structure


Integration & Test of PFI • Integrate the 48 Cobra modules

– 1.5 years for the whole process

• Measure all fiber home position in x, y, z and tilt at 5, 0 and -5 degree C

– 10 µm position accuracy

– 5’ accuracy in fiber tilt


PFS Metrology Camera • 380mm aperture Schmidt telescope • 50M pixel CMOS sensor • Measure all fiber positions with 3 microns error in 2 sec


TransNeptunian Automatic Occultation Survey (TAOS II)


TAOS II System

• Follow >10,000 stars simultaneously – Event rate <0.001/star/year

– 1.3m F/4 wide field telescopes. Rlim = 16.5 @ 20Hz (5σ)

• High speed imaging – Event duration ~200 ms, significant diffraction: 20 Hz sampling

rate

– Custom CMOS imagers: multiple sub-frame readout

• Minimize false positive rate – Require coincident detection in multiple telescopes

– Telescopes separated by >100m to minimize false positives from scintillation

– Three identical telescope systems separated by 130m to 320m


Three TAOS II Telescopes Completed by DFM

10/28/2016 XAO

Telescope #1 (J705)

10/28/2016 XAO

Cameras • High speed readout with

low noise

• Custom CMOS from e2v

– 1920×4608 3-edge buttable

– Back illuminated

– Sub-aperture readout, onboard CDS

• One prototype cameras with test device

– Smaller pixel 1Kx2K

– For the control system tests on site

• Science camera with 10 mosaic CMOS sensors

10/28/2016 XAO

154 mm TAOS focal plane

Custom CMOS Devices from e2v (CIS 113)

10/28/2016 XAO

XAO 10/28/2016

Test Results of CIS 113 Device by e2v

Parameter

Measured

value

Specifications Units

QLIN 15.5 15 ke-

QSAT 19 17.5 ke-

CVF 91 80 μV/e-

Minimum Lag 4.1 1 %

RON 2.3 7 e- RMS

PRNU 2.0 3 %RMS

MOVS 1.61 1.4 V

QE @800nm 47 >20 %

FSR 1.2 1.2 V

Non Linearity 0.8 5 %

Dark current 0.14 0.5 e- /pix/s @0oC

Dynamic

Range

75.2 66 dB

10/28/2016 XAO

San Pedro Mártir

• More than 250 clear nights per year

• Good seeing (0.6 arc sec.) • Dark Sky

– V: 21.5 mag/sq. arc sec.

– R: 20.7 mag/sq. arc sec.

• Light pollution ordinance in effect for Baja California – Working on the same for Baja

California Sur, Sonora


10/28/2016 XAO

Prospective • Project readiness review

April 2016

• Start enclosure construction Sep 2016

• Install telescopes Mar 2017

• Last delivery of CMOS devices by April 2107

• Finish cameras June 2017

• Start survey late 2017

10/28/2016 XAO

TMT WFOS • ASIAA was involved in the ministudy of the

mask exchange system with NAOJ and NAOC

• Tradeoffs between the mask exchange time and the number of masks in MOBIE

– On board or fixed robot

– Curved or flat masks


Summary

• ASIAA has been engaged in different large OIR instruments and delivered key components

• The Chinese large OIR telescope projects are attractive to astronomers in Taiwan, especially the spectroscopic capabilities.

• We are happy to share our experience and expertise for the large telescope projects.


optical & infrared instrumentation effort in...

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