Летняя студенческая программа

в Объединённом Институте Ядерных Исследований

Список проектов

Этот список предназначен для информирования потенциальных участников Летней студенческой программы ОИЯИ о проектах, которые предлагаются данными руководителями. Данный список далеко не исчерпывает направления проектов программы и предназначен для анонсирования своих проектов руководителями, которые пожелали это сделать. При желании, соискатели программы могут ссылаться на понравившиеся им проекты в своих мотивационных письмах.


Описание:

Целью проекта является получение студентами зна¬ний и практики в компьютерных средствах имитационного моделирования, методах статистического анализа данных с оценкой точности и достоверности результатов, основах вейвлет-анализа, применениях искусственных нейронных сетей и кластерного анализа.
Темы проектов для летней студенческой практики ОИЯИ-2016:
  • Применение методов вейвлет-анализа для обнаружения малых пиков в экспериментальных спектрах
  • Применение методов вейвлет-анализа для разделения и параметризации близких сигналов
  • Применение информационных методов анализа социальных сетей для определения структуры малых социальных групп
  • Разработка программы сжатия информации с использованием нейронных сетей
  • Разработка алгоритмов и написанием программы кластеризации откликов трековых детекторов пэдовой структуры.
Требования к студентам:
  • Умение программировать на С++ в операционной системе Linux
  • Представление о пользовании библиотекой ROOT
  • Представление об искусственных нейронных сетях и вейвлет-преобразованиях
  • Знание английского языка, хотя бы на уровне беглого чтения.

Описание:

Introduction

The phase dynamics in superconducting nanostructures has attracted a great attention because of rich and interesting physics from one side and perspective of applications from the other one.  The phase dynamics investigations of intrinsic Josephson junctions in high temperature superconductors are interesting in the context of coherent radiation emission.

In during of the project period the student will study the physics of superconducting nanostructures and get the experience in the computer simulation of their physical characteristics.

Description of the project

The students will concentrate on the computer simulation of the phase dynamics in superconducting nanostructures. The example of the current-voltage characteristics (CVC) simulated for the stack with 10  intrinsic Josephson junctions (IJJ) in high temperature superconductor is presented in left figure. The breakpoint shown in the inset is a parametric resonance point where the longitudinal plasma wave is created in this stack. In right figure we demonstrate the profile of the electric charge on the first superconducting layer. The details are in the recommended papers.

       
 

 
 

 


Figure:  (Left)- The simulated CVC of a stack of 10 IJJ.  The inset shows the enlarged breakpoint region (BPR) for the last branch in CVC. (Right)- Charge oscillation in the first layer in the beginning of B-S part of the BPR. The inset shows the oscillations in the layers 1 and 2.

The problems for students:

1. Investigation of the resonance phenomena in superconducting nanostructures  under microwave radiation.

2. Study of spintronics phenomena by numerical calculations

3. Investigation of the charge imbalance effect in superconducting nanostructures.

4. Majorana physics in Josephson junctions

Results of the project will be presented in the form of the report, which might be considered as a version for scientific paper.

Acceptance criteria

Some experience in computer simulation

Number of the participants

The number of the participants is limited by three students.

Recommended literature

1.    Werner Buckel, Reinhold Kleiner. Superconductivity. Fundamentals and Applications, Wiley-VCH,  2004.

2.    Yu. M. Shukrinov, I. R. Rahmonov, K. V. Kulikov and P. Seidel. E_ects of LC shunting on the Shapiro steps features of Josephson junction. - Europhysics Letters, 110 (2015)

3.    M. Maiti, K. M. Kulikov, K. Sengupta, Yu. M. Shukrinov. Josephson junction detectors for Majorana modes and Dirac fermions. Phys. Rev. B 92, 224501 (2015).

Supervisor of the project

Dr., Prof. Yury M. Shukrinov, leading researcher of BLTP, 100 scientific publications.

E-mail address: shukrinv@theor.jinr.ru   Phone: +7-49621-63844

Описание:
Description
Development of algorithms for solving the direct and inverse problems for the Tolman-Oppenheimer-Volkoff equation, which describes the structure of compact star

Required skills
Programing with C/C++, basic skills in numerical methods for DE, basics skills in thermodynamics and general relativity are desirable

Learning experience
The candidate will get experience in modelling of the realistic structures of compact stars, such as pulsars and white dwarfs, and in development of the effective algorithms of solving non-linear Des, additionally, he will learn the basic of the computational astrophysics.

Project duration
1 to 2 months

Project area
Mathematical Modeling and Computational Physics

Supervisors
A. Ayriyan (LIT), ayriyan@jinr.ru
H. Grigorian (LIT), hovik.grigorian@gmail.com

Recommended References
I. Bombaci, The Maximum Mass of a Neutron Star, Astronomy and Astrophysics 305 (1996), pp. 871–877

Описание:
Description
Development of algorithms of solving the optimization problem for the heat equation in order to find the optimal geometry of the thin plate to provide the given heat distribution on its surface

Required skills
Programing with C/C++, basic skills in numerical methods for PDE

Learning experience
The candidate will get experience in formulation and solving the optimization problems for PDE, and in development of the effective algorithms for its numerical realization

Project duration
1 to 2 months

Project area
Mathematical Modeling and Computational Physics

Supervisor
A. Ayriyan (LIT), ayriyan@jinr.ru

Recommended References
A. A. Samarskii, P. N. Vabishchevich. Computational Heat Transfer. NY: Wiley, Volume 1, 1996. - 418 p.

Описание:
Description
Development of effective algorithms for finding the stationary solutions of the Schrodinger equation as an end state of time evolution process

Required skills
Programing with C/C++, basic skills in numerical methods for DE, basic knowleges in quantom mekhanics and operator algebra are desirable

Learning experience
The candidate will get experience in modelling of the particle bound states, and in development of the effective algorithms for solving non-linear eigenvalue problems

Project duration
1 to 2 months

Project area
Mathematical Modeling and Computational Physics

Supervisor
H. Grigorian (LIT), hovik.grigorian@gmail.com

Recommended References
Luca Nanni The Hydrogen Atom: a Review on the Birth of Modern Quantum Mechanics (англ.). — arΧiv: 1501.05894.
William H. Press, Saul A. Teukolsky, William T. Vetterling, Brian P. Flannery. Numerical Recipes 3rd Edition: The Art of Scientific Computing 3rd Edition. NY: Cambridge University Press. —   1256 p.

Описание:
An example of a CMS event with large total transverse energy (ST=2.6 TeV) and high jet multiplicity (9 jets, denoted by light purple cones and lines)
Поиск микроскопических черных дыр мотивирован проблемой иерархий — огромной разницей между величинами гравитационного и электрослабого взаимодействий. Модель  

ADD (Arkani-Hamed, Dimopoulos, and Dvali) предлагает объяснение этому через введение дополнительных пространственных измерений: только гравитация “чувствует” эти дополнительные измерения пространства, остальные же взаимодействия (электромагнитное, сильное и слабое) заперты в трехмерном срезе  (так называемой “бране”) многомерной вселенной. Это приводит к "разбавлению" гравитационного взаимодействия и делает его проявления более слабыми для наблюдателя, который находится на трехмерной бране. Одно из последствий таких больших ( по сравнению с планковскими масштабами) дополнительных измерений состоит в том что 2 частицы приближающиеся друг к другу на очень малые расстояния могут почувствовать гравитацию друг друга в полной мере и её может оказаться достаточно для образования микроскопической чёрной дыры.

Подробнее о поисках ЧД на CMS: Phys. Lett. B 697 (2011) 434

Описание:
In the framework of this field there are three different projects:  Project_1Project_2Project_3

Описание:

Project name
Phase transition construction for the cold and dense matter
 
Project description
Description of thermodynamical equlibrium between cold hadronic and quark matter phases under conditions of compact stars.
 
Required skills
Programing with C/C++, basics skills in thermodynamics, particularly the Gibbs condition for phase equilibrium
 
Learning experience
The candidate will get experience in modelling of the phase transition with uncertain parameter of the interfacial tension and application in the compact star physics.
 
Project duration
1 to 2 months
 
Project area
Mathematical Modeling and Computational Physics
 
Supervisors
H. Grigorian (LIT), hovik.grigorian@gmail.com
A. Ayriyan (LIT), ayriyan@jinr.ru
 
References
Norman K. Glendenning. First-order phase transitions with more than one conserved charge: Consequences for neutron stars. Physical Review D 46 (1992), 1274-1287

Описание:

Development of parallel pipe-line algorithm for solution of the initial-boundary-value problem for parabolic PDE using explicit and implicit-explicit difference methods.
 
Required skills
Programing with C/C++, basic skills in numerical methods for PDE
 
Learning experience
The candidate will get experience in development of the unusual parallel algorithm for solving parabolic PDE
 
Project duration
1 to 2 months
 
Project area
Mathematical Modeling and Computational Physics
 
Supervisor
A. Ayriyan (LIT), ayriyan@jinr.ru
 
References
A. A. Samarskii, P. N. Vabishchevich. Computational Heat Transfer. NY: Wiley, Volume 1, 1996. - 418 p.
P. Purcz. Parallel algorithm for spatially one-and two-dimensional initial-boundary-value problem for a parabolic equation // Kybernetika (2001), vol. 37, iss. 2, pp. 171-181

Описание:

Introduction

Tier-1 computing center for processing of the CMS data is situated in the laboratory of information technologies in JINR. Tier-1 unites more than 2000 of computing cores and more than 5 PB of storage. In order to increase reliability and reduce down-time of the center the new monitoring system based on Nagios was introduced. It collects data from the lowest level: temperature, CPU and RAM load, etc.

But it is not enough. Critical software and services fails on Tier-1 sometimes. Service monitoring is essential for keeping track of these fails. To increase the up-time of the center new monitoring system development was initiated. This new monitoring system consists of two subsystems: data collection (Python, Beautiful Soup, PostgreSQL) and data visualisation(Django, javascript, jquery, mvc, different visualisation libraries for js).

Task

Now we have a task to improve the development process (DevOps) by introducing new technologies and techniques. We look for a candidate with a good knowledge of:
   1. Web-development
   2. Git
   3. Build systems(grunt or grub)
   4. JavaScript
   5. Linux.
The following skills would be an advantage: Python, Django, continuous integration, unittests.

Описание:

Theme:                Particle and high-energy physics.                                                                                             

·         electromagnetic calorimeter (shashlyk type) with SiPM readout (ECal);

·         data acquisition system;

·         mathematical methods and software for experimental data processing.

Description:      http://nica.jinr.ru/projects/bman.php                                                                                                       

The purpose of this student project is a receipt of knowledge and experience at soft (< 50 MeV) photon yield рр, рА and АА interactions at high energies. These investigations are aimed at study of strong interaction nature in hadronization region. Such experiments are carried out at U-70 (IHEP, Protvino) and Nuclotron (JINR) accelerators.

The evidence the pion or Bose-Einstein condensation (BEC) formation have been obtained with 70 GeV/c proton beams at U-70 in the region of high multiplicity. To establish connection between BEC and anomalous yield of soft photons our SVD-2 collaborations has manufactured an electromagnetic calorimeter with low threshold of registration. The first results on energy release have been obtained by this calorimeter at interactions of the 3.5 A GeV/c deuterium and lithium beams on carbon targets placed at NIS-GIBS setup.

Now BM@N Collaboration is carried out works on manufacturing of electromagnetic calorimeter type “shashlyk” (alternating lead and scintillator plates) for experimental investigations on registration of photons both direct and from decaying neutral particles, and their properties.

Themes of projects for Summer Student Program:

1.       mathematical simulation of an electromagnetic calorimeter work with including into BM@N (Baryon Matter @ Nuclotron) setup structure;

2.       making of readout electronics and software for data taking and data       
 acquisition;

3.       theoretical calculations of energy release in calorimeter in nuclear
interactions.

Описание:

Description:

Development of data visualization components for web UI.

 

Required Skills:

Ability to apply fundamental engineering principles (Separation of Concerns, Loose Coupling, Less is More, Abstraction, Modularity/Reusability, SOLID, DRY, YAGNI, KISS)
Object-oriented development (familiarity with classes, properties, methods, constructors, design patterns)
Web development (familiarity with HTML, CSS, Javascript, APIs)

 

Learning Experience:

The candidate will get experience of a technology development with a team of professionals.

 

Project duration:

6-8 weeks

 

Project Area:

Computer Vision

 

Supervisor:

S. Hnatic (LIT), drhnatic@drhnatic.com

Описание:

General info:

NOvA is a new generation off-axis long-baseline neutrino experiment designed to measure muon (anti)neutrino oscillation parameters. NOvA experimental setup consists of a large volume Far detector situated at a distance of 810km and a smaller Near detector at 1km, which is used to perform relative measurements.  Operating in total for 6 years in the intense neutrino and antineutrino NuMi beams at Fermilab the NOvA experiment will achieve unprecedented sensitivity to the neutrino mass hierarchy and parameters of lepton CP parity violation – two fundamental questions essential for our understanding of the neutrino role in particle physics, cosmology and possible new physics. NOvA experiment started operation in 2014 and presented first results already after the first year of data taking. These results for the numu disappearance and nue appearance oscillation channels confirm the very high potential of the NOvA experiment and excellent performance of the detector components and analysis tools. 

Dubna team:

The JINR team is actively participating in NOvA, providing measurements of electronics parameters, remote control of data taking, computing resources and analyses of data. In 2015 special test bench was constructed at JINR to measure NOvA electronics parameters. Also in 2015 Remote Operation Center (ROC-Dubna) was put in operation allowing to monitor and control the NOvA experiment from Dubna. We also started the process of integrating JINR computing resources into global grid and cloud-infrastructures to contribute these resources to NOvA. We have ongoing analyses connected to neutrino oscillations neutrino-nucleon cross sections and exotics physics.

Research tasks for the students:

1   Working with NOvA-Offline package to study neutrino interactions

2   Study of liquid scintillator properties

3   Deployment and development of the computing systems for the NOvA 

Usefull links

1   https://www-nova.fnal.gov

2   https://cdcvs.fnal.gov/redmine/projects/novaart/wiki

The tasks requires working knowledge of modern computer programming and scripting languages (C++, Python, ROOT). Linux experience is useful to quick start. For 2nd task, basic knowledge of electronics, low level programming, MatLab is very helpful. 3rd task also requires Unix-like systems administration basics.

Описание:

Прецизионная лазерная метрология для ускорителей и детекторных комплексов

АННОТАЦИЯ

Проект лазерного измерительного комплекса, включает Лазерную Реперную Линию,  Прецизионный Лазерный Инклинометр и Абсолютный Измеритель Длины. Он предназначен для метрологического сопровождения  современных ускорителей-коллайдеров и крупномасштабных детекторных комплексов.

Лазерная Реперная Линия с неопределённостью в пространственной координате луча менее десяти микрон обеспечивает прецизионную юстировку основных структурных компонентов коллайдеров и спекторометров. При помощи ЛРЛ также возможен on-line контроль пространственной конфигурации отдельных элементов детекторного комплекса при проведении эксперимента.

Прецизионный Лазерный Инклинометр измеряет угловые микросейсмические движения поверхности Земли  с точностью 10-9 рад, что открывает возможность стабилизации пространственного положения ЛРЛ, параметров пучков, увеличения  светимость коллайдера, повыение точности измерений углов и импульсов в спектрометрах.

Абсолютный Измеритель Длины с точностью измерения 1 мкм на длине 10 м позволит связать координатные системы секторов коллайдера, разделённых детекторным комплексом.

Предполагается, что представленные метрологические инструменты будут работать как единый Лазерный измерительный комплекс во время наборных сеансов и плановых остановках коллайдера.

The Precision Laser Metrology for Accelerators and Detector Complexes

ABSTRACT

The Project proposes the creation of Laser Measurement Complex including the Laser Fiducial Line, Precision Laser Inclinometer and Absolute Distance Meter. The Complex is intended for solving of the tasks of the metrology accompanying of modern large scale accelerators (colliders) and detector systems.

The LASER FIDUCIAL LINE serves to precision adjustment of the accelerator structure units on micron level. The on-line control of the space configuration of internal components of detector complex is also possible allowing the significant decrease of the components space location uncertainties.

The PRECISION LASER INCLINOMETER will measure with 10-9 rad accuracy the microseismic ground motion making possible to improve the space stabilization of the colliding beams parameters in the collision area leading to luminosity increase and improving the momentum and angular measurement precision.

The ABSOLUTE DISTANCE METER with 1 micron measurement precision on the distance by 10 meters will solve on new accuracy level the important task to connect the collider's coordinate systems separated by detector complex.

It is assumed that the above new generation metrology tools will act as unite Laser Measurement Complex during the data taking Runs and scheduled technical stops.

http://indico.jinr.ru/getFile.py/access?contribId=24&resId=0&materialId=1&confId=1314

Описание:

Description:

 

The MPD is a multi-purpose detector designed for registering particles emitted during collisions of heavy ions. The detector is part of NICA (Nuclotron-based Ion Collider facility), an experimental complex housed in the Joint Institute for Nuclear Research (JINR) in Dubna.

 

Among the various components of the MPD is the time of flight detector (TOF). On the basis of temperature measurements taken within the TOF, a temperature regulation and stabilization system should be designed.

 

The main task is to prepare simulation of heat transfer inside the TOF. After that student will build the slow control and the data acquisition systems for measuring the temperature inside the detector.

 

We look for a candidate with a good knowledge of:

 

- LabView,

-C++,

-Electronics,

-basics skills in thermodynamics.


Project duration

1 to 2 months

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