How to get ion mobility of DME

jiangjc-github · April 11, 2023, 5:08am

Dear experts,

I found the topic of getting ion mobility in this link " How to get the Ion Mobility file - Garfield++ - ROOT Forum (cern.ch)". However, there are no ion mobility of DME, do you know how to get the ion mobility of DME?
Thanks very much for help.

Best regard,
Jiechen

bellenot · April 12, 2023, 6:11am

I’m sure @hschindl will be able to help you

jiangjc-github · April 12, 2023, 6:51am

@hschindl
Hi, hschindl，is there some way to know the ion mobility of DME applied in the Garfield++？
Thanks very much.

Best regard,
Jiechen

hschindl · April 12, 2023, 9:33am

I had a quick look at the standard references

H.W. Ellis, R.Y. Pai, E.W. McDaniel, E.A. Mason and L.A. Viehland, Transport properties of gaseous ions over a wide energy range, At. Data and Nucl. Data Tables 17 (1976) 177-210.
H.W. Ellis, E.W. McDaniel, D.L. Albritton, L.A. Viehland, S.L. Lin and E.A. Mason,Transport properties of gaseous ions over a wide energy range, part II, At. Data and Nucl. Data Tables 22 (1978) 179-217.
H.W. Ellis, M.G. Thackston, E.W. McDaniel and E.A. Mason, Transport properties of gaseous ions over a wide energy range, part III, At. Data and Nucl. Data Tables 31(1984) 113-151.
L.A. Viehland and E.A. Mason, Transport properties of gaseous ions over a wide energy range, part IV, At. Data and Nucl. Data Tables 60 (1995) 37-95.

and didn’t find it there, but please have a look yourself if you find data for DME in one of these compilations.

Rob Veenhof found a value of 0.56 cm²/(Vs) for DME+ in DME. This could be a good starting point. You will need to write a new ion mobility file; you could use this one as a template:

jiangjc-github · April 12, 2023, 2:01pm

Thanks very much for your reply, I check the four literatures again and no specification of DME.
I’ll try your reference value of 0.56 cm2/(Vs) in the simulation, but I worry about some difference of the value for large E/N.

BR,
Jiechen