HFI-bottom up

Like all experiments, Planck/HFI had a number of "issues" which it needed to track and verify were not compromising the data. While these are usually discussed in appropriate sections, here we gather them together to give brief summaries of the issues and refer the reader to the appropriate section for more details.

• Cosmic Rays
• Elephants
• 1.6 K Stage Fluctuations
• 4 K Stage Fluctuations
• Popcorn Noise
• Jumps
• 4 K Cooler-Induced EM Noise
• 4 K Cooler-Induced Microphonics
• Pointing-Change Microphonics
• Compression
• Noise Correlations
• Electrical Cross-Talk

• Pointing
• Focal Plane Geometry
• Main Beam
• Ruze Envelope
• Dimpling
• Far Sidelobes
• Planet Fluxes
• Point Source Fluxes

• Time Constants
• ADC Correction
• Gain changes with Temperature Changes
• Optical Cross-Talk
• Bandpass
• Saturation