Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Precision geometric parameter gage for synchrotron radiation   This article includes the description of the geometric parameter gage device
prototype for synchrotron radiation of HERA collider (DESY). The system
construction which capable to measure photo current, caused by such a radiation
in a refractory metal, described here. The system component parts are:
measuring heads and photo current measuring electronics designed by IHEP,
stepper motor by Vacuum Generators with HEDS-550X encoder by Hewlett Packard,
PCI-STEP-4CX 4-Axis Closed Loop Step controller by National Instruments. The
device is controlled by means of Microsoft Visual Basic program using Value
Motion Windows Libraries. The device prototype was tested in the beam of the
DORIS storage ring.

25
The categories of this paper are: patt-sol
5
The categories of this paper are: gr-qc
13
The categories of this paper are: quant-ph
31
The categories of this paper are: ao-sci
2
The categories of this paper are: math
29
The categories of this paper are: funct-an
24
The categories of this paper are: dg-ga
0
The categories of this paper are: hep-ph
36
The categories of this paper are: cmp-lg
19
The categories of this paper are: eess
20
The categories of this paper are: acc-phys
33
The categories of this paper are: plasm-ph
18
The categories of this paper are: econ
1
The categories of this paper are: cs
22
The categories of this paper are: chao-dyn
4
The categories of this paper are: cond-mat