Nov 6, 2005 SSWG 1

Robert StobiePrime Focus Imaging

SpectrographStatus

• Reassembly and retesting in Cape Town• Estimated CTC $343,000 (7.3%) over PDR cap• Delivered to Sutherland 30 Sept• Installed on telescope 10 October• Commissioning delayed by telescope readiness

Nov 6, 2005 SSWG 2

RSS/ PFIS Progress

• In Cape Town

– Polarimetric optics received and tested

– Flexure retest. Improved to ~50% above spec. Await telescope test to see if more improvement warranted

– Fitted and aligned guider

– Slitmask cutter brought up to spec; training performed

– Etalons tested and calibrated

– Detector baffling improved

– Electronics box packaging/ glycol testing

– Pre-Ship Acceptance Test Review

Nov 6, 2005 SSWG 3

Shipping

• Shipped to Sutherland Sept 29/30

• In SALT spectrometer room– Short (control system)

and long (optics integrity) form tests

– Baffling closeouts

– Cabling closeouts

– Lift preparations

Nov 6, 2005 SSWG 4

Lift

• Lifted onto telescope 11 Oct

Nov 6, 2005 SSWG 5

Installation

• Alignment measured using SAC and RSS reference mirrors. Tip/ tilt in spec.

• Focus measured using guider and SALTICAM. Close. Nominal shims installed

• Cabling, detector cooling, glycol, air hookups• Top Hex igloo (Elvis II) lifted and cabled for etalons• First "old photons" 20 Oct.

– 20 Oct: Plate scale 224.1 micron/arcsec; FWHM ~3"

– 30 Oct: Plate scale 222.6 micron/arcsec; FWHM 2.2" (1.5" seeing)

– Imaging limited by telescope (verified on SALTICAM)

• High-Level SALT-style control GUI installed• First focus run with cal system 20051105; verify optics integrity

Nov 6, 2005 SSWG 6

Best Image so Far..

47 Tuc 5 secs 630 nm IF

Nov 6, 2005 SSWG 7

Problems/ Open Items• Control System

– articulation runaway. Solved? Will install safety strap– grating magazine sensor replacement. Done– waveplate encoders not homing– noise preventing stable etalon controller lock– occasional detector noise

• Mechanical– beamsplitter holder still in manufacture

• Software– TCS communications– magazine mapping layer– FITS keywords– turned over to Anthony Koeslag

• Telescope– poor IQ, lack of cal system limiting RSS activities

Nov 6, 2005 SSWG 8

Budget

Nov 6, 2005 SSWG 9

Budget: Cost-to-Completion

• increase ~190K from last meeting• remaining budget deltas: commissioning completion

$-

$1,000,000

$2,000,000

$3,000,000

$4,000,000

$5,000,0002002 2003 2004

PD

R

CD

R

De

liver

y

Est Cost to Completion

UW

SAAO

RU

TotalExpenditures

Baseline

20% Budgeted Reserve

now

2005

Nov 6, 2005 SSWG 10

Budget: Deltas• Deltas (since last meeting) Tot Over Cap

– salaries $7K

– Capital + Subcontract overruns $52K

– RU Travel & Shipping $6K

– UW Schedule stretch July -Oct $115K

– RU Commissioning increases $16K

Total $190K $343K (7.3%)

• Expected– Schedule stretch Nov-Dec $30K

– Resale of CaF2 spares ($10K)

Total $20K

• Total $363K (7.7%)

Nov 6, 2005 SSWG 11

Commissioning; Schedule

Nov 6, 2005 SSWG 12

Some Commissioning and Calibration Observations

Status What Type Mode D/N Source

Tried Focal Plane Tilt Calibration Imaging Night Starfield

Tried Center of rotation Calibration Imaging Night Starfield

Tried Slitviewer focus Calibration Any Day Dome?

Biases Calibration Any Cldy Night None

Shutter latency Calibration Imaging Day QTH flatfield

Crosstalk calibration Calibration Spec Day Neon

Spectr station posn Calibration Spec Day Penrays

Flexure Charact All Day Penrays

Started Imaging Focus: > 430 nm Calibration Imaging Day QTH

Imaging Efficiency/ linearity Charact Imaging Night Phot Std Fld

Spec Focus Calibration Spec Day Penrays

Spec Efficiency Charact Spec Night 2 flux standards

Polarimetric Efficiency >500 nmCalibration Specpol Day QTHPolarimetric Efficiency <500 nmCalibration Specpol Night Blue starPolarimetric PA, efficiency Calibration Specpol Night 3 pol standards

Instrumental Polarization Calibration Specpol Night 2 unpol standards

Nov 6, 2005 SSWG 13

Schedule Summary• Commissioning schedule issues

– availability of calibration system, autoguider, moving baffle– training of PFIS SA– operational maturity. Efficiency now < 20%– integration of commissioning and remaining telescope and

payload tasks• Payload commissioning

– cal system• flatness, stray light issues• throughput good so far

– moving baffle, pupil• SW to run cals

– guider• throughput issue solved?• significant ops SW required

– stray light bafflingQTH flat 20051105

Nov 6, 2005 SSWG 14

Handover and Commissioning

• SALT currently understaffed by ~2x• Need to define/ schedule PFIS handover

– After 9 Nov, only KHN and EBB available

– After 13 Dec, team gone

• Commissioning tasks not likely to complete– MOS spectroscopy

– High speed spectroscopy

– All Phase II (ie PIPT, OCS) tasks

Nov 6, 2005 SSWG 15

Commissioning Holdups

• Suggested solution– turn over remaining tasks to SA's after acceptance

– possible 2006 consulting trips by ebb, dh, khn (SALT funded)

Mode Holdup by Dec 12?

Acceptance (flexure, efficiency)

Cal System OK

Imaging Image Quality OK

Longslit Spec Cal System OK (hand guide)

MOS Spec Cal, Guider, SW Not likely

High Speed Dtr SW Not likely

Fabry-Perot Noise Possible

Polarimetry Cal, WP, Beamsplitter Partial?