GONG Hα Instrument

More documents

Recommendations

Info

Filter Concerns• Delivery.• Wavefront quality. Loaner was fine but ourold unit is poor. Contingency plan tocorrect low-order aberrations if necessary.• Temperature gradient strategy success.• Uniformity among 10 units.September 22, 2009 <strong>GONG</strong> H-alpha Review 26
CCD Camera Requirements 1• Match Nyquist frequency to MTF cutoff– 2048 x 2048 pixels to capture full disk• Fast readout, short exposure– Produce image in under 1 s (control blur)• Large dynamic range– Low dark noise (for disk and prominences)– Large full well (for flares)September 22, 2009 <strong>GONG</strong> H-alpha Review 27
Page 1 and 2: GONG Hα InstrumentJ. Harvey & GONG
Page 3 and 4: Instrument Design Goals• No signi
Page 5 and 6: Prototype Optical DesignPBSFCCDL1L2
Page 8 and 9: Field Curvature & DistortionSeptemb
Page 10 and 11: Optics Summary• Simple system mee
Page 12 and 13: Hα Filter Selection• Considered
Page 14 and 15: Filter Test SetupCMOScamera,lens an
Page 16 and 17: Sample Filter HWHM•Fit Fabry-Pero
Page 18 and 19: Solar Test Setup• Rooftop light f
Page 20 and 21: Filter Status• 10 filters on orde
Page 22 and 23: Filter StatusC:\Documents andSettin
Page 24 and 25: September 22, 2009 GONG H-alpha Rev
Page 28 and 29: CCD Camera Requirements 2• Robust
Page 30 and 31: Camera Tests• Tested cooled and u
Page 32 and 33: Camera Dark Noise vs Exposuredark n
Page 34 and 35: Camera Noise vs LightNoise vs Signa
Page 36 and 37: Camera Results• Cameras show expe
Page 38 and 39: Mechanical Requirements• Simple i
Page 40 and 41: Sled DetailSeptember 22, 2009 GONG
Page 42: Remaining Issues• Optics- Quality

GONG Hα Instrument

Create successful ePaper yourself

Delete template?

Save as template?