Some doubts about the energy setting of X-ray sources about xrt

[kklmn]

Hi,

The meaning of source parameters is explained in the docs.

How can I set the X-ray energy I need?

You set the value of energies field of your source instance. The interpretation of energies depends on the value of distE.

In the same example, there are three versions of energy definition:

beamLine.sources[0].distE = 'flat'
beamLine.sources[0].energies = eAxisMin, eAxisMax

beamLine.sources[0].distE = 'lines'
beamLine.sources[0].energies = E0,

beamLine.sources[0].distE = 'lines'
beamLine.sources[0].energies = [E0 + dEStep * i for i in range(-3, 4)]

[999-x]

Hi,

The meaning of source parameters is explained in the docs.

How can I set the X-ray energy I need?

You set the value of energies field of your source instance. The interpretation of energies depends on the value of distE.

In the same example, there are three versions of energy definition:

beamLine.sources[0].distE = 'flat'
beamLine.sources[0].energies = eAxisMin, eAxisMax

beamLine.sources[0].distE = 'lines'
beamLine.sources[0].energies = E0,

beamLine.sources[0].distE = 'lines'
beamLine.sources[0].energies = [E0 + dEStep * i for i in range(-3, 4)]

Hello! Thank you for your answer. At the same time, I would like to know how the Takagi Taupin equation is reflected in the code, but I was unable to find it in the code for this example. I hope you can give me some guidance.

Hi,

The meaning of source parameters is explained in the docs.

How can I set the X-ray energy I need?

You set the value of energies field of your source instance. The interpretation of energies depends on the value of distE.

In the same example, there are three versions of energy definition:

beamLine.sources[0].distE = 'flat'
beamLine.sources[0].energies = eAxisMin, eAxisMax

beamLine.sources[0].distE = 'lines'
beamLine.sources[0].energies = E0,

beamLine.sources[0].distE = 'lines'
beamLine.sources[0].energies = [E0 + dEStep * i for i in range(-3, 4)]

Hello! Thank you for your answer. At the same time, I would like to know how the Takagi Taupin equation is reflected in the code, but I was unable to find it in the code for this example. I hope you can give me some guidance.

[kklmn]

If you look at the same compiled doc strings (here), you would see that the link the Takagi-Taupin equations <useTT> leads you to the useTT parameter of the Crystal class. There is a variable with the same name in the script that you may want to change.

[999-x]

If you look at the same compiled doc strings (here), you would see that the link the Takagi-Taupin equations <useTT> leads you to the useTT parameter of the Crystal class. There is a variable with the same name in the script that you may want to change.

First of all, thank you for your reply. Through the document you provided, I may be able to understand the content of the Takagi Taupin equation. But in the example I used, useTT seems to only be equal to True or False. Is it enough to change it to True or False according to my needs?

[kklmn]

Is it enough to change it to True or False according to my needs?

Yes. What holds you from trying?

[999-x]

Yes. What holds you from trying?

Thank you for your reply. Currently, I have not yet understood the specific content of this equation. I will try again after understanding the content of the equation.

[999-x]

Is it enough to change it to True or False according to my needs?

Yes. What holds you from trying?

Hello! may I bother you again.
I have two questions to ask. Firstly, does changing the crystal thickness cause any changes in the curve?
I changed the crystal thickness, as shown in Figures 1 and 2, and the curve seems to have not changed.

Secondly, the Bragg angle calculated by setting the crystal plane index to (6,6,0) should be between 89 ° and 90 °, but Figure 3 shows that the Bragg angle is 90 °. Why is this?

Looking forward to your reply！

[yxrmz]

Well, the curve will stop changing after certain thickness threshold as it gets closer to "infinitely" thick crystal limit. Try 0.05-0.01mm, you will see the difference.
Regarding the Bragg angle, there might be a tiny difference between the value you use for the Si crystal lattice parameter and the one used in xrt, that becomes important as you approach 90deg. I get 89.923 deg for 9686.06eV.

[999-x]

Well, the curve will stop changing after certain thickness threshold as it gets closer to "infinitely" thick crystal limit. Try 0.05-0.01mm, you will see the difference. Regarding the Bragg angle, there might be a tiny difference between the value you use for the Si crystal lattice parameter and the one used in xrt, that becomes important as you approach 90deg. I get 89.923 deg for 9686.06eV.

Thank you for your reply

[999-x]

Well, the curve will stop changing after certain thickness threshold as it gets closer to "infinitely" thick crystal limit. Try 0.05-0.01mm, you will see the difference. Regarding the Bragg angle, there might be a tiny difference between the value you use for the Si crystal lattice parameter and the one used in xrt, that becomes important as you approach 90deg. I get 89.923 deg for 9686.06eV.

Hello, I'm sorry to bother you. I may need to insert a capillary optical element for simulation. May I ask if there is a model of the optical element capillary in xrt?

[kklmn]

Hi,
Looking the documentation website for "capillary" is not an option for you?

[999-x]

Hi, Looking the documentation website for "capillary" is not an option for you?

thank you！