Gravity images of the sun below the photosphere, Cameras and Memory Chips as gravitational detectors
Hi Athiray,
I was just going to write you. I am reading about soft x-ray camera noise. “Performance characterization of UV science cameras developed for the Chromospheric Lyman-Alpha Spectro-Polarimeter”
And now reading “Modeling charge transport in Swept Charge Devices for X-ray spectroscopy”
I have been tracking the solar imaging groups for several years, and slowly absorbing the models, sensors, data and phenomena. I want to use arrays of gravitational sensors in time of flight mode to scan the sun just under the photosphere down through the convection zone. But before that I need to calibrate the detectors. The only solar signals I could find were the coronal mass ejections. I thought those were well modeled and understood, but found all the groups are rather vague. So I diverted for a year or so to see if I can sort that out. I found that cameras can be used for detecting gravitational signals (perhaps, likely, but not certain). The gravitational potential field is grainy. More it flows and fluctuates. It is not perfectly smooth. And as far as I can tell, the gravitational energy density on the surface of the earth peaks about 1.25 KeV but tails off into the extreme ultraviolet and some higher energies. It is that spectrum I would like to see if it is real. So I thought maybe the people using CCDs for sensors might have measured the background spectrum of the cameras as a function of temperature, with very very precise control on the threshold potential as the electron acceleration will depend on that.
I have been reading since early morning and my eyes are tired. I just wanted to say hello.
You can work out the resolutions possible with mm wave radio telescopes with baselines from earth to moon. That, focused on those regions you are interested on the sun might be a cheap way to put bounds on what is happening. The AIA data can set the temperature, but the radio telescopes can get the temperature even better and use that with models of the plasma. I read about PyAtomDB earlier. I have followed x-rays for more than 50 years. Every few years I have to find all the newer datasets, methods and changes.
I really wonder if gravity is just an emergent phenomena that is primarily lots of different frequencies and spatial scales and atomic response functions. Such problems are fun.
I would like to see frame of lossless data from a dark and uniformly lit CCD. I am looking to see what they cost. But the ones used were old (2006?) and I am on lots of camera manufacturers lists, especially high sensitivity ultrafast frame rate. With 1 million small regions of a frame per second that is 300 meters on the sun. Earth sized baselines. There are some gravity gradiometers that can fly on drones, so they should work in orbit. But earth based can work as well, after long calibration.
Better get back to it. Can you point me to some actual raw data from those cameras – on earth? Or do you have better ones in mind. Your paper has lots of interesting things.
Did you ever try using memory chips as x-ray detectors? The read out is slightly different, but the “floating gate” devices and the ones that put multiple bits as charge. https://en.wikipedia.org/wiki/Floating-gate_MOSFET and https://en.wikipedia.org/wiki/Charge_trap_flash and https://en.wikipedia.org/wiki/Flash_memory#X-ray_effects
Richard
