Image Quality Upgrade Kickoff Meeting Daniel O Connor August

Image Quality Upgrade Kickoff Meeting Daniel O’Connor August 6, 2002

GOAL: Make the IRTF a Telescope which is atmosphere seeing limited

Part I. Improve HVAC System (TB) l Monitor Dome Environment (DYW) l Provide Routine Image Quality Assessment (DOC) l Characterize Static Optics of Telescope (DOC) l Provide WEB based Documentation (DOC) l

Individual Presentations Tim - HVAC l Darryl – Monitoring System l Miranda – Software, WEB l Dan – all else l

HVAC UPGRADE GOAL : To have an operational HVAC system in place, with the capability to set the dome thermal environment to a temperature specified by the operator. That temperature will be based on predictions as to what the outside temperature will be during that evenings observing run.

HVAC : History Hired consultant to make recommendations. l Recharged refrigeration circuit. l Replaced compressor. l Simplified system circuitry. l Misc. smaller items. l

HVAC : Dome Seals Air infiltration is currently overwhelming the HVAC system. l Dome Skirt l Dome Slit (sides) l Dome Slit (top) l

HVAC : Primary Cooling Makes sense to concentrate cooling effort where it is required the most. l May be possible to utilize coude loop hardware in primary mirror cooling scheme. l

HVAC : Misc. High Priority Items Need to specify, order, install, and calibrate several temperature sensors, and flow meters. l Install air bleeds in coude loop. l Install defrost circuit in coude loop l Install air separator. l

HVAC : Medium Priority Items Implement a control system. l Examine machinery room ventilation. l Determine exhaust tunnel utilization. l Install Expansion Tank l Adjust Dome Louvers l

HVAC : Low Priority Items Overall System Documentation l Emergency Shutdown Procedures l Staff Training l

HVAC : Schedule l Blah, blah

HVAC : Schedule

Monitoring Dome Environment The goal is to be able to accurately monitor and record the temperature and humidity of our dome/telescope environment Use existing Johnson Controls temperature and humidity sensors in dome ceiling Install new sensors external to dome, on the telescope, and on primary mirror Warning ‘pop-up’ message on operators screen to notify of potential risk to optics Archive database and make web accessible

Sensors Johnson Controls Sensors Vaisala Sensors Omega PT 100 Sensors

Data Monitoring Hardware Lake. Shore 218 E Monitor Omega DP 472

2’ T Internal Dome Sensors T 20. 5’ T 33’ H 45. 5’ H T 45. 5’ T T 2’ 2’ T 45. 5’ 33’ T T 20. 5’ T T 2’ H 33’

External Dome Sensors T H T

Dome and External Sensor Locations T H T T H H T T T

T Telescope/Mirror temperature sensor locations T T T

Dew Point Monitoring Future installment of cooling the primary mirror will put higher risk of dew and frost forming Purchase of a Vaisala HMP 243 module and mount near primary Calculate the dew point using our humidity and temperature sensors Warning ‘pop-up’ message on operators screen to notify of potential risk to optics

Data Acquisition Schematic Telescope J. C. Humidty Sensors Lake. Shore 218 E Dew Pt. Mon Mirror Mounted Sensors PT 100 Lake. Shore 218 E RS 232 Digi Portserver #1 RS 232 Network RS 232 Omega DP 472 Vaisala Humidity Temp Sensors J. C. Temp Sensors Telescope Mounted Sensors PT 100 RS 232 MUX MODEM Lake. Shore 218 E AC MODEM Slip Ring AC Power AC MODEM Dome MODEM MUX RS 232 Dome Floor Mounted Sensors PT 100 Lake. Shore 218 E Building RS 232 Wind Speed/Direction RS 232 Digi Portserver #2 Network

Slip Ring

Monitoring and Web Software Miranda Hawarden-Ogata, Albert Fhema l 24 hour monitoring of all dome and telescope sensors, with data to be archived. l GUI to notify telescope operators and IRTF staff of critical environmental changes in the dome. l Static web pages to display the collected dome environment data plots. l Real-time web pages to display current dome environment data. l Interactive web pages to display selected dome environment data.

Monitor System Collect Data Monitoring Overview Filter Data Display for TOs Archive Data Web Display

2’ T Birds’ eye view of existing sensors T 20. 5’ T 33’ H 45. 5’ H T 45. 5’ T T 2’ 2’ T 45. 5’ All sensors not mounted on the telescope itself or outside the dome will be displayed on this web page. 33’ T T 20. 5’ T 2’ H 33’

Sensors mounted on telescope and mirror T T All sensors mounted on the telescope itself will be displayed on this web page. T T Additional information will be displayed at the bottom of the sensor web pages. T T T T

3. ) Provide Routine Image Quality Assessment l GOAL: Build an auto-focus system for use with NSFCam and SPe. X to provide and automated estimate of focus for the observer, and provide routine assessment of image quality.

3. ) cont. Advantages of Auto. Focus Observer spends less time focussing l Will focus more often (its easier) l Will provide consistent data on FWHM and Strehl, not subjective l

Auto-Focus Schematic NSFCam SPe. X HEXAPOD Take Image READ FOCUS WRITE FOCUS HEXAPOD DAEMON IDL Fit Routine FWHM, Strehl, Image, Fit GUI Storage IQ Archive Best Fit Focus

3. ) cont. Focus Update l After A-F working, develop procedure to do Focus Update based on temperature model of telescope truss.

4. ) Characterize Optics of Telescope l Goal: Understand factors in the telescope optics and mirror support system that limit image quality

4. ) cont. TASKS Hire Optical Consultant l Measure Primary and Secondary Mirrors with interferometric technique l Provide measurement of contribution to error budget l Produce final report l

5. ) Provide WEB based Documentation Integrated WEB site for IQUP l Dedicated page for each sub-project l

Schedule / Manpower