1. An X-ray diagnostics at Protosphera?
Enrico Costa
IAPS - INAF
Gruppo Plasmi IAPS 30/11/2018

2. An X-ray diagnostics at Protosphera? Why?
We have evidence that the experiment is creating the conditions for reconenction. The question is:
Is reconnection acceleraring particles significantly above the involved temperatures a up to which energy? The answer can derive frm diagnostics at different wavelengths.
Given the uncertainty of the hypothesis and the limited resources we should privilege fast and cheap experiments to achieve a first raw answer.
In case of a positive detection a more complex experiment can be set up, also based on well established technologies.
Gruppo Plasmi IAPS 30/11/2018

3. The Goal To detect X-Rays associated with reconnection events.
Amount so far totally uncertain.
It is reasonable to go down as far as possible with energy.
We need:
A detector with associated read out electronics and recording system
Environment monitoring instrumentation
A window to separate the inside of the Protosphere with the outside.
A mechanical mounting including a collimating system to identify the direction of the possible X-rays
Possible associated instrumentations to verify the functionality of the
We assume that some of this equipment can be shared with other esisting facilties.
Gruppo Plasmi IAPS 30/11/2018

4. INSIDE OUTSIDE: The window
Element C1 C2
8 µm Be (0.3 mil)
12 µm Be (0.5 mil) Li 0%
29% Be
13% B
0.06%
19.7% C
4.3%
43.9% N
20.2%
59.2% O
29.4%
62% F
46.1%
69% 4% 1% Ne
58.1%
72.9%
20% 9% Na
65.4%
75.1%
40%
27% Mg
70.6%
77.3%
59%
47% Al
75.4%
80.3%
73%
64% Si
64.7%
81.8%
82%
75%
The options for the window are: Be
Plastics
SiN3
The request to go as low as possible with the energy
Gruppo Plasmi IAPS 30/11/2018

5. A possible solution
A commercial SDD detector from AMPTEK with associated electronics and a Si N3 window.
Gruppo Plasmi IAPS 30/11/2018

6. First decision
To verify that the detector (with is window) can be harbored within Protosphere. This is the first point to discuss. Otherwise we must move to another configuration namely a detector outside a separate window that would be unavoidably thicker.
Gruppo Plasmi IAPS 30/11/2018

7. In case it works
In case we detect X-rays and fix the energy scale we can design a much better experiment definitely based on not-commercial staff.
A pinhole with a large area SDD (100 cm2)
A mask with a large area SDD (100 cm2)
A lobster eye optics with [what?]
……….
Gruppo Plasmi IAPS 30/11/2018