last update, 16-April-2009
Novel StriPixel Detector, the mass-production prototype, for PHENIX Silicon Vertexl Detector
| How the
spin of proton
is formed with 3 quarks and gluons? This is a very fundament question
QCD, Quantum Chromodynamic. The RHIC
Spin Project has been established to solve this problem by
two polarized protons for the first time in history.
Collisions of polarized protons are measured with the PHENIX detector at RHIC.
| Research program is organized
Spin Physics Working Group, and analysis of the PHENIX data
performed at CCJ combined
with RIKEN super computer
Recent analysis on the asymmetry of the neutral pion production has shown that the gluon polarization in proton is surprisingly small, i.e. gluon is less likely the career of proton spin. Natural ansatz from this discovery is existence of significant orbital motion in the proton.
| At RHIC QGP, Quark Gluon Plasma, should be created by
two gold nuclei, through which we can study the state of early Universe
just after the Big Bang.
Very recently, enhanced e+e- pair yield above hadronic sources is observed in Au+Au collisions at RHIC. The characteristic temperature is determined to be 221 MeV. This will be the key measurement to determine the nature of the hot and dens matter RHIC created.
| While RHIC creates nuclear matter with high
of dense nuclear matter was being performed at KEK,
and phi meson modification at normal nuclear density was discovered as
| Theory group in Radiation Laboratory is studying
aspects of physics at RHIC. Our global analysis for world-wide
data showed the gluon polarization in proton is strongly
with recent data from RHIC.
||To enhance physics capability of PHENIX even further, PHENIX
Upgrade R&D is on going through the collaboration with BNL
instrumentation division, CERN-ALICE and CERN-NA60.
|| Developments of laser-induced plasma ion source is
a collaboration with BNL Accelerator Division. This source ejects the
highest intensity of carbon and aluminum beam so far, and will be used
for an ion injector for RHIC. This method is so compact and can
useful for cancer therapy as well.
|| By combining novel methods for neutron
optics with super conducting tunnel-junction detector, we aim to
precise measurements for neutron decays. Applications go also to
interference and neutron scattering.
Recent Memorial Events
Hiromi Okada, former Junior Research Associate of Radiation Lab., received RHIC & AGS thesis award 2007. R. Muto, former Special Doctral Fellow of Radiation Lab., received 2007 Young Scientist Award of the Physical Society of Japan. H En'yo and S. Yokkaichi received Significant Achievement Award in RIKEN, March 2008.
Click above to go to RIKEN Research Article
Five-year MoU between RIKEN and BNL was signed by BNL Director S, Aronson and RIKEN President R. Noyori, Jan. 2007.
T. D. Lee, Director emeritus of RIKEN BNL Research Center has awarded for The Order of the Rising Sun, Gold and Silver Star （旭日重光章）, Jan. 2007.
Old member list(2007)
Old member list(2006)
Old member list(2005)
Old member list(2004)
Old member list(2003)
People Left from Radiation Lab.
RIKEN-BNL Research Center
OUT REACHES ( in Japanese)