Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Method for estimating charge breeder ECR ion source plasma parameters
  with short pulse 1+ injection   A new method for determining plasma parameters from beam current transients
resulting from short pulse 1+ injection into a Charge Breeder Electron
Cyclotron Resonance Ion Source (CB-ECRIS) has been developed. The proposed
method relies on few assumptions, and yields the ionisation times
$1/n_e\left\langle\sigma v\right\rangle^{\text{inz}}_{q\to q+1}$, charge
exchange times $1/n_0\left\langle\sigma v\right\rangle^{\text{cx}}_{q\to q-1}$,
the ion confinement times $\tau^q$, as well as the plasma energy contents
$n_e\left\langle E_e\right\rangle$ and the plasma triple products $n_e
\left\langle E_e\right\rangle \tau^q$. The method is based on fitting the
current balance equation on the extracted beam currents of high charge state
ions, and using the fitting coefficients to determine the postdictions for the
plasma parameters via an optimisation routine.
  The method has been applied for the charge breeding of injected K$^+$ ions in
helium plasma. It is shown that the confinement times of K$^{q+}$ charge states
range from 2.6$^{+0.8}_{-0.4}$ ms to 16.4$^{+18.3}_{-6.8}$ ms increasing with
the charge state. The ionisation and charge exchange times for the high charge
state ions are 2.6$^{+0.5}_{-0.5}$ ms--12.6$^{+2.6}_{-3.2}$ ms and
3.7$^{+5.0}_{-1.6}$ ms--357.7$^{+406.7}_{-242.4}$ ms, respectively. The plasma
energy content is found to be $2.5^{+4.3}_{-1.8}\times 10^{15}$ eV/cm$^3$.

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The categories of this paper are: hep-lat
4
The categories of this paper are: cond-mat
18
The categories of this paper are: econ
21
The categories of this paper are: adap-org
1
The categories of this paper are: cs
10
The categories of this paper are: q-bio
32
The categories of this paper are: atom-ph
36
The categories of this paper are: cmp-lg
2
The categories of this paper are: math
13
The categories of this paper are: quant-ph
9
The categories of this paper are: nlin
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The categories of this paper are: q-alg
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The categories of this paper are: dg-ga
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The categories of this paper are: mtrl-th
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The categories of this paper are: eess
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The categories of this paper are: plasm-ph