From the Göttingen Fabry-Perot Interferometer to the Gregor FPI

Transcription

1 From the Göttingen Fbry-Perot Interferometer to the Gregor FPI K.G. Puschmnn, F. Kneer, H. Nickls, A.D. Wittmnn Institut für Astrophysik, Göttingen Workshop Modern Solr Fcilities - Advnced Solr Sience Göttingen, September 2006

2 The new Göttingen Fbry Perot t the VTT: Opticl design Nrrowbnd: Interference filter (FWHM~10Å) Brodbnd etlon 0.125mm (FWHM~0.4Å) Nrrowbnd etlon 1.1 mm (FWHM~26 må) Nrrowbnd cmer BB Cmer F2 FB NB BB FB IF1 F2 FPI FPI NB Cmer F3 L3 IF2 PB Polrimeter Bemsplitter 95/5 TL1 TL2 HL1 HL2 f=180cm f=180cm f=225cm f=119cm Brodbnd: Brodbnd interference filter (FWHM~100Å) Brodbnd cmer Polrimeter: λ/4 retrder nd 2 crossed clcites. Imge on the CCD2 divided into ½(IV) & ½(I-V). From the Göttingen Fbry-Perot interferometer to the Gregor FPI

3 Min componts: Detectors Imger QE (LVision) CCD Chip: 12 Bit Sony ICX285AL Redout noise: 4.5 e Spectrl rnge: nm Chip size: 8.8 x 6.7 mm 688 X 520 pix, 2x2 binning (Gregor: 1376 x 1040 pix) Pixel size: 12.9 x 12.9 µm, 2x2 binning (Gregor: 6.45 x 6.45 µm) Imge scle: /pix (Gregor: /pix) FOV: 77 x 58 (Gregor: 51 x 39 ) Typicl frme rtes: 63% t 550 nm 50% t 650 nm 20% t 850 nm Gregor: Binning 1x1 VTT: Binning 2x exposure time (ms) frmes/sec frmes/sec From the Göttingen Fbry-Perot interferometer to the Gregor FPI

4 Min components: Etlons Setup VTT: IC Opticl Systems Ø=50mm ( = 0.125mm) F ~ 37 IC Opticl Systems Ø=70mm ( = 1.1mm) F ~ 46 Setup Gregor: IC Opticl Systems Ø=70mm ( = 1.1mm) F ~ 46 IC Opticl Systems Ø=70mm ( = 1.4mm) F ~ 46 Coting: nm Etlon controller: 2 x CS100 3 chnnel controllers from IC Opticl Systems: 3 xis cpcitnce bridge servostbilising prllelism nd cvity spcing of the etlons Spcing control: digitl vi RS-232 port From the Göttingen Fbry-Perot interferometer to the Gregor FPI

5 Min components: Etlons - Airy functions Setup VTT: Etlon =70mm, F ~ 46, = 1.1mm Etlon =50mm, F ~ 37, = 0.125mm Setup Gregor: Etlon =70mm, F ~ 46, = 1.1mm Etlon =70mm, F ~ 46, = 1.4mm From the Göttingen Fbry-Perot interferometer to the Gregor FPI

6 Min components: Etlons Spectrl scnning FTS profile (dshed), FTS profile convolved with FPI Airy function (red) nd observed flt field men profile in Fe 6173 Å nd Hα. Reconstructed nrrowbnd imges t 18 different wvelength positions throughout the 6173 line, Δλ=20mÅ.Totl FOV = 62.9 x Typicl spectrl line scns: 15 imges/spectrl position, 20 positions, Δλ~20 må nd Δt=17 s From the Göttingen Fbry-Perot interferometer to the Gregor FPI

7 TIP I & TIP II : Tenerife Infrred Polrimeters (IAC) M. Colldos: [email protected] Full Stokes Polrimeters: I,Q,U,V The modultor consist of two ferroelectric liquid crystls. IR CCD Iʹ = I Q U V (Q,U,V ) (I,Q,U,V) I CCD Iʹ 2 = 21 I 22 Q 23 U 24 V Iʹ = I Q U V Modultor Iʹ = I Q U V Spectrogrph LCVRs focl plne TIP I Tip II Re-imging system (only for TIP I) light λ - rnge μm μm Spectrl rnge 7.5 Å 15 Å FOV 40 x (scnning) 70 x (scnning) nlyzer Pixel size 0.38 x 30 må 0.17 x 15 må Exposure time 50 ms > 28 ms modultor Frme rte 8 img./s 30 img./s Polrimeter Modultion freq. 2 Hz (8/4 sttes) < 7.5 Hz (30/4 sttes) (ctul 1 Hz) spectrogrph slit

8 Softwre Bsed on DVis 7 (Dt Acquisition nd Visuliztion Softwre Pckge, LVision) Development nd integrtion of GUI pplictions written in CL to combine FPI control nd imge cquisition 1. Settings for Detectors Selection of cmers, exposure time, frme rte, binning, prt of the chip used for redout Cn be stored in userdefined settingfiles From the Göttingen Fbry-Perot interferometer to the Gregor FPI

9 Min components: Softwre Softwre 2. Mnul Etlon control nd cmer lignment Mnul etlon control for test scns nd line djustment Visuliztion of recored imges nd men scnned profile. Live imge with overly function From the Göttingen Fbry-Perot interferometer to the Gregor FPI

10 Min components: Softwre Softwre Observtionl prt Userdefined scntbles (pre-filter number, strt nd endpoint in wvelength, increment, number of imges /position). Definition of cycle numbers nd totl cycle time Disply of FPI position, imge number, scn number, scn durtion visuliztion of imges nd spectrl line fter ech scn (optionl) From the Göttingen Fbry-Perot interferometer to the Gregor FPI

11 Beobchtungsschem Softwre Auslesen der Kmer First scn strtet Auslesen der Scntbelle Scn strt FPIs zu Pos (x) Next scn Wit step n(x) Bilder Lst scn gespeichert Visulisierung gespeicherte Scn end Bilder und des mittleren Linienprofiles Auslesen der Kmers

12 Die wichtigsten Dten des neuen Spektrometers

13 Finl opticl design for Gregor: AO FPI From the Göttingen Fbry-Perot interferometer to the Gregor FPI

14 Opticl Design Setup2: Etlon =70mm, = 1.1mm; Etlon =70mm, = 1.4mm FPI sttus report: Gregor meeting Mrch 2006

15 Spot digrm: F6 Brodbnd Setup2: Etlon =70mm, = 1.1mm; Etlon =70mm, = 1.4mm opticl xis field edge digonl field corner FPI sttus report: Gregor meeting Mrch 2006

16 Spot digrm: F6 Nrrow-bnd Setup2: Etlon =70mm, = 1.1mm; Etlon =70mm, = 1.4mm opticl xis field edge digonl field corner FPI sttus report: Gregor meeting Mrch 2006

17 FPI: Ø=50,70 mm Outstnding mteril Lenses Nr: f (mm) Ø (mm) dr(mm) dm(mm) costs TL , x TL ,3 18,5 365 x Lenses Nrrow-bnd HL , x HL , x Brodbnd CCDL x CCDL ,5 12,5 240 x Continuum CL ,3 5,5 65 x CL , x Video VCL , x FPI: Ø=70,70 mm 4274 Lenses Nr: f (mm) Ø (mm) dr(mm) dm(mm) costs TL ,5 12,5 240 x TL ,6 9,5 120 x Nrrow-bnd HL , HL x Brodbnd CCDL CCDL ,5 12,5 240 Continuum CL ,3 5,5 65 CL , Video FPI sttus report: Gregor meeting Mrch 2006 VCL ,

18 Outstnding mteril Mirrors Mirror Nr: Size (mm) dr (mm) Qulity Quntity costs M x 85 8 λ/ x totl 6694 Rils NG11/2mm width: height: 63 % trnsmission Ril FSL 95 95mm 23mm Qulity:λ/10 Type (length, mm) Nr: Quntity costs FSL M FSL M FSL M FSL M FSL M totl 8337 FPI sttus report: Gregor meeting Mrch 2006

19 Detektoren PTU (progrmble timing unit) triggert und synchronisiert die Detektoren, die permnent Bilder mit vorgegebener Frequenz ufnehmen um gleichmäßige Bedingungen während der Beobchtung zu schffen. Kontrolle der Speicherung der erforderlichen Bilder durch Softwre Dten direkt uf ein Rid-System geschrieben. Mximle Bildrte (f b ) hängt von Belichtungszeit (t exp ), Auslesezeit (t ro ) und dem Binningfktor (b y ) b 1/f b = t exp t ro /b y. Die Auslesezeit der Imger QE beträgt 100ms ( ohne Binning) kein Binning Belichtungszeit (ms) Bilder/sec Binning 2x2 pixels Bilder/sec ,3 14.1

20 Observtionl results Exmples of ltest results with the new instrument t the VTT Poster P07 Poster P36 Dynmics of the quiet photosphere nd its mgnetic field under high sptil resolution K. G. Puschmnn 1, I. Domínguez Cerdeñ 2, F. Kneer 1 Observtions of flring ctive region in Hα B. Sánchez-Andrde Nuño 1,2, K. G. Puschmnn 2, F. Kneer 2 1 Mx Plnck Institute for Solr System Reserch, Ktlenburg-Lindu, Germny 2 Institut für Astrophysik, Göttingen, Germny 1 Institut für Astrophysik, Göttingen, Germny;; 2 Instituto de Astrofísic de Cnris, L Lgun, Spin

21 Observtionl results: Quiet solr photosphere Trget: Quiet sun ner disk centre DATA REDUCTION OBSERVATIONS Dte: 4 My 2006 Observers: K.G. Puschmnn, I. Domínguez Cerdeñ Instrumenttion: New Göttigen Fbry-Perot Interferometer Stokes V Adptive Optics Speckle reconstruction (Puschmnn & Siler, 2006, A&A, 454, 1011 ) of brodbnd imges ccounting for the field dependent correction of Adptive Optics Nrrowbnd reconstruction using spectrl rtio (Weigelt, 1977, Optics. Com. 21, 57) nd speckle msking methods (v.d.lühe, 1984, J.Opt.Soc.Am., 1, 150;; de Boer, 1996, A&AS, 120, 195) Correltion trcking nd destretching of FOV = 77 x 53 (35 x 53 for polrimetry, 29 x 43 fter reconstruction) Imge scle = /pix Dt Acquisition: 147 spectrl scns of Fe I lines nm nd nm Δ t = 34 s reconstructed imges Intensity, velocity (centre of grvity) nd mgnetic field (B_eff from V mplitudes, wek field pproximtion) mps Subsonic filtering with cutoff of 5 km/s r0 up to 30 cm!!! 15 short exposed (5ms) nrrowbnd (FWHM = 26 må) imges / spectrl position, 20 spectrl positions per line, Δλ = 20.1 må. simultneous recording of 300 brodbnd imges (FWHM = 5 nm) round 550 nm per scnned spectrl line for post-fctum imge reconstruction From the Göttingen Fbry-Perot interferometer to the Gregor FPI

22 Observtionl results: Flring ctive solr region in Hα Trget: Active region NOAA AR10875 (θ=53 ) Observtions DATA REDUCTION Speckle reconstruction (Puschmnn & Siler, 2006, A&A, 454, 1011 ) of brodbnd imges Dte: 26 th April 2006 ccounting for the field dependent correction of Adptive Optics Observers: B. Sánchez Andrde Nuño, K.G. Puschmnn Instrumenttion: New Göttigen Fbry-Perot Interferometer Adptive Optics Nrrowbnd reconstruction using spectrl rtio (Weigelt, 1977, Optics. Com. 21, 57) nd speckle msking methods (v.d.lühe, 1984, J.Opt.Soc.Am., 1, 150;; de Boer, 1996, A&AS, 120, 195) Correltion trcking of reconstructed imges FOV = 77 x 58 Imge scle = / pixel Dt Acquisition: 126 spectrl scns of the Hα line (6563 Å), Δ t = 17 s r0 up to 28 cm!!! 15 short exposed (5ms) nrrowbnd (FWHM = 55 må) imges / spectrl position, 21 positions Δλ = må. Simultneous recording of 315 brodbnd imges (FWHM = 5 nm) round 630 nm for post-fctum imge reconstruction From the Göttingen Fbry-Perot interferometer to the Gregor FPI

23 K. G. Puschmnn, F. Kneer, T. Seelemnn, nd A. D. Wittmnn 2006, The new Göttingen Fbry-Perot spectrometer for twodimensionl observtions of the Sun, A&A, 451, 1151 Fruitful workshop nd nice dys in Göttingen The End