000008085 001__ 8085
000008085 005__ 20260318155439.0
000008085 037__ $$aCTALK-2026-0102
000008085 100__ $$aBerghmans, David
000008085 245__ $$aUnsaturated EUV imaging of solar flares at unprecedented temporal/spatial resolution
000008085 260__ $$c2026
000008085 269__ $$c2026-03-18
000008085 520__ $$aImaging flares in the EUV is difficult as the flare brightness easily exceeds the sensor dynamic range. This leads to local saturation and blooming. Also, flare dynamics are usually not resolved, even at the resolution of AIA. The HRIEUV telescope of the EUI instrument onboard Solar Orbiter has surpassed these limitations. Blooming of the flare signal is avoided as HRIEUV uses a CMOS sensor and not a CCD. Saturation is avoided by operating the instrument in a cycle in which the regular images are interleaved by a large number of short exposure images. The explosion of telemetry is avoided by advanced compression that allocates autonomously the limited bits to describe the best exposed features in the image, which is the flare, wasting very little bits on the rest of the underexposed data. We present an overview of the numerous results obtained from observations of a few tens of C and M flares, down to 100km & 2s scales, that have been coordinated through the so-called Major Flare Watch SOOPs with SPICE, PHI/HRT and STIX. This includes previously unresolved dynamics in footpoints and ribbons with bright plasma blobs raining down, persistent bidirectional flows near the flare core, and overall unwinding structures. We will conclude with the relevance of these observations for future flare observations such as on the SPARK mission proposed for the ESA M8 mission call.
000008085 594__ $$aSTCE
000008085 6531_ $$aEUI
000008085 6531_ $$asolar flares
000008085 700__ $$aCollier, Hannah
000008085 700__ $$aDominique, Marie
000008085 700__ $$aHayes, Laura
000008085 700__ $$aKasparova, Jana
000008085 700__ $$aKraaikamp, Emil
000008085 700__ $$aKerr, Graham
000008085 700__ $$aLorincik, Juraj
000008085 700__ $$aLomou, Konstantina
000008085 700__ $$aReid, Hamish
000008085 700__ $$aRyan, Daniel
000008085 700__ $$aVerbeeck, Cis
000008085 773__ $$tSolar Orbiter - IRIS - ADITYA-L1 workshop, Berlin
000008085 8560_ $$fdavid.berghmans@ksb-orb.be
000008085 85642 $$ahttps://plan.events.mpg.de/event/453/contributions/2430/
000008085 85642 $$ahttps://sidc.be/EUI/data/presentation/20260318-SolarOrbiterWorkshop-Berlin-UnsaturatedEUVimagingFlares.key
000008085 8564_ $$s4139103$$uhttps://publi2-as.oma.be/record/8085/files/20260318-SolarOrbiterWorkshop-Berlin-UnsaturatedEUVimagingFlares_small.key.pdf
000008085 8564_ $$s11003$$uhttps://publi2-as.oma.be/record/8085/files/20260318-SolarOrbiterWorkshop-Berlin-UnsaturatedEUVimagingFlares_small.jpg?subformat=icon-180$$xicon-180
000008085 8564_ $$s13891$$uhttps://publi2-as.oma.be/record/8085/files/20260318-SolarOrbiterWorkshop-Berlin-UnsaturatedEUVimagingFlares_small.gif?subformat=icon$$xicon
000008085 906__ $$aContributed
000008085 980__ $$aCTALKCONT