Spectrometer HELLRIDE as a Testing Ground

for Fulldisk Velocity MappingJoachim Staiger, KIS Freiburg

- HELLRIDE Overview- First Observations at VTT 2013

- Problems- Ongoing Development

- Fulldisk „Lab“- Fulldisk Tests 2014

HELLRIDE Overview

Instrument Type: 2D Fabry-Perot Spectrometer

Operation Focus: Multiline Operation16 Bands available

100“-by-100“ FOV standard300“-by-300“ synthetic

Fulldisk ?

HELLRIDE Overview

HELLRIDE stands for

HELioseismological Large Regions Interferometric Device

HELLRIDE Overview

Scientific Target: - Analysing Waves in the Atmosphere- Analysing Flares

Requirements: - Long Recording Times

Oportunity: - Future VTT Usage

HELLRIDE Overview

Development Goals

- Simple Design- Easy Handling- Step-by-Step Approach- Cost effective Approach (Stock / Scrap)

HELLRIDE Overview

Optical Layout

- Dual Etalon Tandem Configuration- Collimated Beam Design

HELLRIDE Overview

Etalons

- IC Optical EC50 and EC70- 530 nm – 860 nm

HELLRIDE Overview

Narrowband Filter Mount

- 4 x 4 Matrix- 0.5 μ Repositioning

HELLRIDE Overview

Narrowband Filter Mount

- 4 x 4 Matrix- 0.5 μ Repositioning

HELLRIDE Overview

Narrowband Detector

- Dalsa 1M30 CCD- 14 μ Pixel Square- 4-Axis Mount

HELLRIDE Overview

„Onboard“ Software

- System Simulation- Data Quicklook- Ringdiagramm Pipeline (64 x 64)

HELLRIDE Overview

Status: Installed at VTT since 2013

First Observations 2013

Campaign 1: A. Wisniewska (April, 6 Days)Campaign 2: A. Wisniewska (September, 6 Days)

Sunspot / Quiet Sun2 Spectral Lines (5434 / 5890)Cadence 15 secs10 Hour Records

First Light Results 2013, A.Wisniewska

Linear Powerspectrum, 2 Hours, 5434 Angstr. Pixel Average

First Light Results 2013, A.Wisniewska

Ringdiagram 64x64, 8 Hours 5434 Angstr., 3.0 mHz

First (and only) Multiline Test 2009

Multiline Ringdiagramms4 Hours, 60 secs Cadence, 16 Lines

Using GFPI Etalons

Spectral Lines: 517.2 nm Mg I 20 Scansteps538.0 nm C I 15 Scansteps538.1 nm Fe I 15 Scansteps538.2 nm Ti I 15 Scansteps543.4 nm Fe I 10 Scansteps557.6 nm Fe I 20 Scansteps589.6 nm Na I 30 Scansteps590.0 nm Na I 30 Scansteps630.1 nm Fe I 20 Scansteps630.15 nm Telluric 15 Scansteps630.2 nm Fe I 15 Scansteps654.5 nm H-Alpha 25 Scansteps632.0 nm He-Ne 15 Scansteps709.1 nm Fe I 20 Scansteps777.1 nm Fe I 20 Scansteps777.2 nm Fe I 10 Scansteps

First (and only) Multiline Test 2009

Multiline Ringdiagramms4 Hours, 60 secs Cadence, 16 Lines

Using GFPI Etalons

Problems and Shortcomings

Crash after appr. 2 hours: Resolved -Axis 2 Malfunction: Not yet resolved Spring 2014Graphics Overload: Not yet resolved Spring 2014Camera Upgrade: Not yet resolved Autumn 2014Outdated VTT Handling Under development Spring 2014

Environmental Exposure: Not yet resolved 2014 / 2015Image Motion: Not yet resolved Spring 2015Lateral FOV Drifts Under development 2015 / 2016

Data Processing Software: Under development 2015

Problems and Shortcomings

Pending Tasks:

Update: Aging ComponentsCamera SystemComputing

Reduce: Thermal ExposureStraylight

Seeing based Image Motion

Pointing Instabilities

Developments

Encasement

- Shield off Dust- Shield off Straylight- Reduce Temperature Fluctuations

Developments

High Speed Drives

- No rotating Parts- Moving EM Field- 10 G Acceleration -

Developments

Tablet Usage

- Versatility - Hardware Reduction - Remote Handling

Developments

Realtime Velocity Mapping

- Enable Realtime Ringdiagram-Pipeline- Reduce Data Storage Bottleneck- Enable Remote Operations

- Offline Tests Successful- Calibration with SDO Pending- Will be implemented as an Observers Option

Developments

Doppler Signal Locking

- Laser attached to Matrix Mount- Continuous Laser Line Scanning

Developments

Doppler Signal Locking

- Laser attached to Matrix Mount- Continuous Laser Line Scanning

Developments

Doppler Signal Locking

- Using Frequency stabilized Laser (< 3 MHz)- Drift < 2 m/sec, 8 hours- Realtime Peak Location Processing- Feedback to Etalons

Developments

New Finesse Calibration

- Adust Etalon Plate Parallelity - Stabilize Wavelength Purity

Developments

New Finesse Calibration

- Adust Etalon Plate Parallelity - Stabilize Wavelength Purity

Developments

New Spectroscopic Tracking

Problem: - Image Motion- No AO Usage over 10 hours.

Solution: - Spectroscopic Correlation- Individual Wavelength Tracking- Overlay Wavelengths

Developments

Remote Control

Motivation: Off-Lab MonitoringRemote MaintenanceStaff Limited OperationAutomated Operation

Realization: TCP/IP SocketsClient / Server ArchitectureASCII Commands

Developments

Full Disk Velocity Mapping Tests

Goals: - Evaluate Exposure Times- Evaluate Scan Step Requirements- Evaluate Readout Options- Evaluate Multiline Options- Evaluate Fulldisk / Subfield-Tiling- Test Flat Procedures- Compare to SDO /GONG- Extrapolate from 5 cm to 50 cm Aperture

Developments

New Absolute Pointing

Existing Problem: - Thermally related Drifts

Developments

New Absolute Pointing

Thermal Drifts: - May Influence Co-Alignment- May influence Data Analysis- Is Inherent Pointing Shortcoming

Developments

New Absolute Pointing

Thermal Drifts: - May Influence Co-Alignment- May influence Data Analysis- Is Inherent Pointing Shortcoming

Developments

New Absolute Pointing

Thermal Drifts: - May Influence Co-Alignment- May influence Data Analysis- Is Inherent Pointing Shortcoming

Developments

New Absolute Pointing

Thermal Drifts: - May Influence Co-Alignment- May influence Data Analysis- Is Inherent Pointing Shortcoming

Developments

New Absolute Pointing

Goal: - Develop New Pointing Model

Developments

New Absolute Pointing

Approach: - Guiding Telescope is Imaging Telescope- Pointing is of Barcode Type Reading

Developments

New Absolute Pointing

Tests: - VTT / SDO 2012- VTT / GONG 2012- VTT / SUMER / IRIS 2013

Developments

New Absolute Pointing

Benefits: - Delivering absolute Coordinates continuously

- First Primary Beam Closed-Loop Operation

- Significant Stability Improvement

- No rigid Link between Guiding and Main Telescope

- Multiple Telescopes may share single Guiding Telescope

- Single Telescope may use Multiple Guiding Telescopes

- Minimum Engineering required

- Off-the-Shelf Components may be used.

Fulldisk „Laboratory“

Usage:

- New Pointing

- HELLRIDE Fulldisk Tests

- IAC Coelo Test (Solar Orbiter) ?

Fulldisk „Laboratory“

Locations:

HELLRIDE

Fulldisk „Lab“

Fulldisk „Laboratory“

Test Setup 2012:

- Setup HELLRIDE Data Aquis. System- Divert Guiding Beam to Dalsa- Fit Sun to Detector- Record Fulldisk at Short Cadence

Fulldisk „Laboratory“

Test Setup 2012:

Fulldisk „Laboratory“

Test Setup 2012:

Problems: - Mounting / Dismounting required- Vertical Optical Axis- „Transit“-Area

Fulldisk „Laboratory“

New Setup 2013 / 2014:

Fulldisk „Laboratory“

New Setup 2013 / 2014:

Fulldisk „Laboratory“

New Setup 2013 / 2014:

Fulldisk „Laboratory“

New Setup 2013 / 2014:

Fulldisk „Laboratory“

New Setup 2013 / 2014:

- Secluded Location off „Transit“-Area- Beamsplitter instead of Mirror- Continuous Operation- Horizontal Optical Bench- Elevator Access („HELLRIDE Drive-In“)- Standard HELLRIDE Software may be used- Retrofit time appr. 1 – 2 hours

Fulldisk „Laboratory“

Mech. Engineering: Thomas Sonner

The End