Introducing the Frank Laboratory of Neutron Physics of the Joint …newuc.jinr.ru › img_sections › file › pract08 › 01.07 › Introducing... · 2008-07-18 · Joint Institute

Joint Institute for Nuclear Research

Introducing the Frank Laboratory of

Neutron Physics of the Joint Institute

for Nuclear Research

A.V.Belushkin

On behalf of the FLNP


Fedor L’vovich Shapiro

1915 – 1973

Deputy director in 1959

– 1973.

Frank Laboratory of Neutron Physics

Il’ya Mikhailovich

Frank

1908 – 1990

Director in 1957 – 1988.

Nobel Prize 1958.

FLNP is established

in 1956 soon after the

foundation of JINR.

Scientific activity is focused

on :

- nuclear physics,

- condensed matter physics

- applied research.

The IBR-2 high flux

pulsed reactor is the FLNP

basic facility.

The permanent staff is

around 400 persons.


The world’s first pulsing reactor

Operation started 23.06.1960. At present decommissioned.


High intensity pulsed source

of resonance neutrons IREN

2008Completion of construction

of the IREN complex with non-multiplying target.


Electron gun testing



E-gun control room

Start pulse adjustments



Start pulse, June 2008

Ug = 140 ÷ 145 kV; Jg = 1,1÷1,2 А;

F = 0,5 Hz, Tp = 0,5 mks.


RQCD

max 10 6

Nuclear fission

Fundamental

Applied

Fundamental symmetriesIn neutron

induced reactions

Ultracold neutrons

Highly excitedstates of the nuclei

Neutron activation analysis

Fundamental properties of the neutron

Neutrons in space

Construction of the IREN


Direct measurement of the neutron-neutron scattering

cross-section at the reactor YAGUAR

Prospects

1. First test experiment (2004) “Measurement of neutrons fields in and under the reactor well” -performed

2. Second test experiment (2006)“Measurement of neutron scattering cross-section of well-known gases (calibration) ”

3. The main measurement (2006)


New universal optical effect

was observed with UCNs for the first time in history

120 140 160 180 200 220 240

1,2

1,4

1,6

1,8

2,0

2,2

2,4

2,6

2,8

Distance between the filters (mm)

Ph

as

e (

rad

ian

)

E ( )

nV=at

0 0exp i k x t 1

exp i i k x t

0 0exp i nk x t

V=aV=0

Theoretical predictions:

K.Tanaka (1982) – for light

F.V. Kowalski (1993)

V.G.Nosov, F.I.Frank (1998) – for neutrons;

Experimental verification 2005-2007 (FLNP - ILL)

Theoretical predictions

Phase in the absence

of the accelerating matter effect

(simulation)

10E (2 5) 10 eV

1 nE maL

n

A.Frank, G.Kulin, D.Kustov

FLNP JINR


Experiments with Mini-Fobos detector at IBR-2 (2006)

Fine structures in the mass-tke

distributions


Neutron Reactor IBR-2

Pulsed reactor with neutron flux 1016 n cm-2 s-1

has been operating since 1984

D. Blokhintsev

N. Dollezhal and I. Frank


Just before first neutrons at the IBR-2! (1980)


IBR-2 – fast pulsing reactor

Source: IAEA-TECDOC-1439, February 2005


IBR-2 – fast pulsing reactor


Development and Support

Science

Study of fundamental problems of the structure and dynamics of condensed

matter.

Complementary research connected with physics, chemistry, biology, Earth

sciences, material sciences.

Investigations on behalf of the Federal Agency of Atomic Energy of Russia.

Operation, development and extension of the instrumentation at the IBR-2.

Scientific and technical assistance to external users at the IBR-2.

Further development of the user program at the IBR-2.

Neutron scattering at IBR-2

Main activities in the field


stripe arrays

imbedded nanoparticlesin polymer matrix

magnetic multilayer films

MONITORING of theINTERNAlL STRUCTURE

in VARIOUS NANOSYSTEMS

multilamellar vesicles for biochemical applications

buried quantum dots

Nanowires in mesoporous silica

supermirrors

After V.Lauter-Pasyuk

What objects do we study?


• Fog

• Whipped cream

• Milk

• Cheese

• Blood plasma

• Pearls

• Everyday life: glues,

paints, soaps...

•Biological materials (human

body is a “soft machine”)•Polymer melts/solutions•Liquid crystals T

smectic-C smectic-A nematic isotropic

• Colloidal dispersions


From simplicity to complexity

Self organization

Folding & aggregation Dynamics & functionStructure

Atoms & molecules

Neutrons


Basic research: Biology - from structure to functions

Self organization

Folding

& aggregationDynamics

Structure

formation

Atoms & molecules

Function


For the first time:

• Complementary analysis of data of small-angle neutron

scattering and high-resolution X-ray diffraction on lipid

membranes resulted in experimental determination of the

value of universal constant cfl = 0.111 0.005 of the

interaction of random fluctuating surfaces, which is in

agreement with theory.

• The study revealed that the strength of repulsive entropic

force related to the interaction leads to critical unbinding

transition at higher temperatures, which has a critical

behavior and proceeds in accordance with the two-state

model.

Nature (2002), v.419/3 p.484

Phys. Rev. E. (2005) v.72

p.061913

Nature (2006), v 440/2 p.115

Membranes are of great interest for the statistical physics of

fluctuating (random) surfaces. These surfaces include a

wide range of physical objects from biomembranes to world

sheets swept out in time by strings between elementary

particles in the theory of fundamental interactions.

Lipid membranes as fluctuating surfaces


Shape deformation of the vesicles in the

strong magnetic field as method to

characterize the vesicle flexibility via

SANS

B, 4T

A schematic representation of an ultradeformable, mixed lipid vesicle penetrating a narrow pore, owing to the shape-induced demixing of bilayer

components.

Vesicular based drug delivery systems


Relative units

Zn

Tula

Zaokskiy

Aleksin

Suvorov

Belev

Odoev

Yasnogorsk

Novomoskovsk

Schekino

PlavskBogoroditsk

Arsen’evo

Chern’

Efremov

Uzlovaya

Teploe

Kurkino

Venev

Kireevsk

Kimovsk

Volovo

V

Tula

Zaokskiy

Aleksin

Suvorov

Belev

Odoev

Yasnogorsk

Novomoskovsk

Schekino

PlavskBogoroditsk

Arsen’evo

Chern’

Efremov

Uzlovaya

Teploe

Kurkino

Venev

Kireevsk

Kimovsk

Volovo

Ni

Tula

Zaokskiy

Aleksin

Suvorov

Belev

Odoev

Yasnogorsk

Novomoskovsk

Schekino

PlavskBogoroditsk

Arsen’evo

Chern’

Efremov

Uzlovaya

Teploe

Kurkino

Venev

Kireevsk

Kimovsk

Volovo

As

Tula

Zaokskiy

Aleksin

Suvorov

Belev

Odoev

Yasnogorsk

Novomoskovsk

Schekino

PlavskBogoroditsk

Arsen’evo

Chern’

Efremov

Uzlovaya

Teploe

Kurkino

Venev

Kireevsk

Kimovsk

Volovo

Ecological Investigations at the IBR-2 Reactor


Russia

PolandSlovakiaUkraineRomaniaSerbiaBosniaBulgariaMacedonia

JINR contribution to

the European Atlas-2000

of Atmospheric Heavy

Metal Deposition

Ecological Investigations at the IBR-2 Reactor


The map of MD sensor is contributed by epithermal neutrons mainly left (top).

This MD map is consistent with the map for epithermal neutrons from Neutron Spectrometer (bottom)

Count rate over the South Pole is 5-10 times lower (blue region)

– doubtless water presence

NEUTRON LOGGING IN SPACE:

SEEKING WATER ON MARS AND OTHER PLANETS

HEND has 4 signals of neutrons from sensors SD, MD, LD

and SC/IN, and for each of them the map of orbital measu-

rements is currently produced.


1 m

300 km

From orbital data – to data on the surface


Welcome to JINR (Dubna)

Documents

Introducing the Frank Laboratory of Neutron Physics of the Joint …newuc.jinr.ru › img_sections › file › pract08 › 01.07 › Introducing... · 2008-07-18 · Joint Institute