IBR-2 call for proposals

Bokuchava Gizo gizo at nfsun1.jinr.dubna.su
Sat Apr 29 11:49:44 CDT 1995

CALL FOR PROPOSALS - Round 95/2 (October 1995 - February 1996)

The neutron fast pulsed IBR-2 reactor is resuming operation after
substitution  of  new  movable  reflector.  A  cycle  has    been
established of 2 weeks of operation for users, each followed by a
one week period for maintenance and machine development. There is
a long shut down period between the end of June and the middle of
October. The main parameters of IBR-2 are following:

Average power                                   2 MW
Peak power in pulse                             1500 MW
Power, released between pulsed                  0.1 MW
Pulse repetition rate                           5 Hz
Thermal neutron pulse width                     320 microsec
Thermal neutron flux density from the surface of the grooved-type
- time average                                  5x10^13 n/cm^2/sec
- burst maximum                                 10^16 n/cm^2/sec
Volume of core                                  22 litres
Coolant                                         liquid sodium
Moderator: water, 300 K, flat and comb-like, cold methane  (under
construction) for operations in the range from 20 to 50 K  Number
of channels: horizontal - 14, vertical - 2.

Experimental facilities of the IBR-2  are  open  to  the  general
scientific community. In this call for proposals, ten instruments
are available for applicants, including:

High resolution Fourier diffractometer  (with  RTOF  analysis  of
scattered neutrons) for precise structural analysis of powders.

2. DN-2
Time-of-flight diffractometer for investigations  of  the  atomic
structure of single crystals and powders, phase transitions, real
time studies.

3 DN-12
Time-of-flight diffractometer for high-pressure investigations.

Time-of-flight  diffractometer  for   texture    and    structure
investigations, mainly for pole figure measurements of geological
materials, metals and alloys.

5. SNIM-2
Neutron spectrometer for investigations in pulsed magnetic fields to:
a) study the  quasistationary  magnetic  structures,  induced  by
pulsed fields;
b) study the kinetics of first order  magnet  phase  transitions,
induced by pulsed fields;
c) study of dynamics of induced phase state.

6. YuMO
Small  angle  TOF  spectrometer  for  investigation  supra-atomic
inhomogeneities on the scale from 10 A to 300 A. Studies  of  the
structure  and  dynamics  of  lipid  and  biological   membranes,
ribosome subparticles, properties of  surface-active  substances,
hydratation of Portland cements and clinker minerals.

7. SPN-1
Time-of-flight polarized neutron spectrometer  with  polarization
analysis  of  scattered  neutrons  to    conduct    micromagnetic
inhomogeneity  investigations.  Spectrometer  can  operate  as  a
reflectometer to study magnetic and superconducting  thin  films.
The investigations are the micromagnetism  of  ferromagnetic  and
the mixed state of super-conductors, and reflectometry studies of
thin magnetic films.

Multicrystal inverted geometry time-of-flight  spectrometer  with
medium and high resolution. The NERA spectrometer is intended for
simultaneous measurements of  inelastic  (INS)  and  quasielastic
(QNS)  neutron  scattering  spectra  to  obtain  neutron   powder
diffraction (NPD) spectra of the sample under investigation.  The
main investigations are  connected  with  phase  transitions  and
molecular dynamics of polymorphic substances.

Time-of flight an inverse geometry spectrometer for  simultaneous
measurements of inelastic and elastic  scattering.  Applications:
phonon  states  density,  molecular  spectroscopy,  hydrogen   in
metals, magnetic excitations and crystal field spectroscopy.

10. DIN-2PI
Time-of-flight spectrometer  of  direct  geometry.  Applications:
atomic  dynamics  of  quantum  and  classical   liquids,    solid
solutions, lattice dynamics of metals and alloys.

If you wish to apply for  beam  time  on  an  instrument,  please
submit a proposal. Proposal forms are included in our mailing for
the call for proposals. Also proposal forms may  be  obtained  by
anonymous   ftp:
ftp    nfdfn.jinr.dubna.su  (IP  address:
Name:  anonymous
Password:  (give  your  e-mail address)
            cd incoming
            binary  (or similar command to set transfer mode to binary)
            get apf.zip    (to get the WinWord 6.0 version file)
    or      get apfword2.zip     (to get the WinWord 2.0 version file)

Proposals must be typewritten in English and fully self-contained
within  the  proposal,  since  no  additional  material  will  be
transmitted to the experts. If you are worried about missing  the
proposal deadline, you may send your proposal by FAX  or  E-mail.
In this case you should also send us a copy in the mail  with  an
indication that the proposal has been sent by FAX or E-mail.

The proposals' deadline for round 95/2 (October 1995  -  February
1996) is 16 May 1995.

Two yearly proposal rounds were  established  at  FLNP  with  the
following deadlines:
16 October for the period  February-June
16 May for the  period October-February

For additional information contact
Vadim V. Sikolenko or Gizo D. Bokuchava
Frank Laboratory of Neutron Physics
Joint Institute for Nuclear Research
141980 Dubna, Moscow region, Russia

Phone:        (7-09621) 65-273, (7-095) 924-39-14
Fax:          (7-09621) 65-882, (7-09621) 65-429
e-mail:        sikolen at nf.jinr.dubna.su
               gizo at nf.jinr.dubna.su

Information about the neutron scattering instruments, user policy
and  the  proposal  system in Frank Laboratory of Neutron Physics
is available via World Wide Web: 
More information about Joint Institute for Nuclear  Research   is
available on http://www.jinr.dubna.su.

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