Comment of   
Vyacheslav Victorovich Gerasimenko's graduate work
"System Resources Usage Minimization in Numerical Modeling
 of Charged Particle Beam Dynamics"

The subject of the work relates to 
the wide area of investigations
conducted at the chair of the theory 
of electrophysical apparatus control systems
under the direction of professor D.A. Ovsyannikov.
The radio frequency quadrupole (RFQ) acceleration channel 
considered in the work
is electrophysical device
with moulded electrodes.
To choose geometry of the surface
providing best quality of the beam
requires a great amount of computations.
In view of it,
there arose a need to investigate
various approaches,
which allow to increase efficiency of computations
within the bounds of this problem.

The task which was posed to V.V. Gerasimenko
consisted in analysis of these approaches
with the aim of their further making use 
for beam simulation in the process of optimization.

In the process of preparation of the graduate work
V.V. Gerasimenko had considered a mathematical model,
which can be applied for the beam dynamics description
in the optimization process,
and had designed a software,
which allows to investigate various ways of solving of the problem,
mainly using parallel computations.
Test computations
allowing to compare effieciency of various approaches 
were carried out.
So, one might say that the undergraduate copes with the task. 

To characterize the work as a whole,
it should be noted that the undergraduate 
had performed a great amount of work,
which requires the high-level programming skill.
In the process of working on dissertation
V.V. Gerasimenko showed his worth as a highly skilled
specialist, who is able to solve
problems in mathematical physics
with using of necessary computing facilities.
High level of self-dependency of the undergraduate  should be also mentioned.
Text of the work makes a good impression.

Insufficiently extensive coverage
of various ways to increase efficiency
is a main disadvantage of the work.
But this disadvantage is overriden
by the mentioned advantages.
Besides, it is more important that
the problem is formulated
and corresponding investigations are fulfilled.

As a result, I regard this work as excellent.

Scientific adviser,
dr. phys.-math. sci., prof.    O.I. Drivotin