THE PLAN OF DEVELOPING

1
SEARCHING for the MIXED PHASE
THE PLAN OF DEVELOPING the JINR NUCLOTRON for
the REALIZATION of the PROJECT of SEARCHING for
the MIXED PHASE
A.D. Kovalenko
ROUND TABLE DISCUSSION, JINR, Dubna, July 7-9,
2005,
2
SEARCHING for the MIXED PHASE
THE NUCLOTRON EXISTING ACCELERATOR FACILITY
ROUND TABLE DISCUSSION, JINR, Dubna, July 7-9,
2005.
A.D. Kovalenko
3

SEARCHING for the MIXED PHASE
NUCLOTRON MAIN PARAMETERS
ROUND TABLE DISCUSSION, JINR, Dubna, July 7-9,
2005.
A.D. Kovalenko
4

SEARCHING for the MIXED PHASE
NUCLOTRON
expected
ROUND TABLE DISCUSSION, JINR, Dubna, July 7-9,
2005.
A.D. Kovalenko
5
SEARCHING for the MIXED PHASE
ACCELERATOR RD GOAL Au, , U ion beams at
the energies above 5 GeV/u
ROUND TABLE DISCUSSION, JINR, Dubna, July 7-9,
2005.
A.D. Kovalenko
6
SEARCHING for the MIXED PHASE

• THE MAIN NECESSARY RD
• ION SOURCE KRION
• and also
• VACUUM IN THE RING
• FIELD RAMP B ? 2 T/s
• LINAC LU-20 UPGRADE
• BEAM DIAGNOSTIC etc.

ROUND TABLE DISCUSSION, JINR, Dubna, July 7-9,
2005.
A.D. Kovalenko
7
RD IN A PROGRESS
ROAD TO the MAXIMUM DESIGN DIPOLE MAGNETIC FIELD
in the NUCLOTRON
NOTE, each dipole was tested at the nominal cycle
parameters 2 T, 4 T/s, 1Hz at the test bench
before installation in the ring. The peak field
of more than 2.2 T is correspond to the quench
current of the magnets.
ROUND TABLE DISCUSSION, JINR, Dubna, July 7-9,
2005.
A.D. Kovalenko
8
NUCLOTRON Beam Energy Increasing
THE WORKS HAVE BEEN PERFORMED in 2004

• Main Power Supply Upgrade I 6000 kA (nominal
  operating)
• 
  B 2 T, dB/dt 1 T/s .

• Quench Detection System The system self-test
  before operating
  ..cycle was put into operation.

• Stored Energy Evacuation System The
  works were carried out, but not completed up to
  now. THUS, WE SHOULD TO LIMIT SUPPLY
  CURRENT in the DIPOLES by the MAXIMUM VALUE of
  1.6 T

ROUND TABLE DISCUSSION, JINR, Dubna, July 7-9,
2005.
A.D. Kovalenko
9
NUCLOTRON Beam Energy Increasing
RUN 30, DECEMBER, 2004
? 1.6?, dB/dt 0.6 T/s Ed 4.32 GeV/u
(Z/A ½)
ROUND TABLE DISCUSSION, JINR, Dubna, July 7-9,
2005.
A.D. Kovalenko
10
THUS, THE ROAD TO THE DIPOLE 2 T MAGNETIC FIELD
IN THE NUCLOTRON HAVE PASSED IN THE SUBSTANTIAL
PART, NEVERTHELESS, THE WORKS SHOULD BE
CONTINUED in 2005-2006
ROUND TABLE DISCUSSION, JINR, Dubna, July 7-9,
2005.
A.D. Kovalenko
11
NUCLOTRON Beam Energy Increasing
THE WORKS ARE CARRIED OUT in 2005

• Main Power Supply Quench Detection System
  Working tests.

• Energy Damp System Completion of the necessary
  upgrade.

• The Field Control System Completion of the
  necessary upgrade.

• Beam Extraction System Test of the beam
  extraction at higher energies. Upgrade of the ESS
  (design).

• Beam Transportation Lines and RF upgrade in
  limited frames

ROUND TABLE DISCUSSION, JINR, Dubna, July 7-9,
2005.
A.D. Kovalenko
12
SEARCHING for the MIXED PHASE
NUCLOTRON ROAD TO HEAVIEST IONS at HIGHEST
ENERGIES
ROUND TABLE DISCUSSION, JINR, Dubna, July 7-9,
2005.
A.D. Kovalenko
A.D. Kovalenko
13
EXPECTED HEAVY ION BEAM PROGRESS PLANNED in 2001
ROUND TABLE DISCUSSION, JINR, Dubna, July 7-9,
2005.
A.D. Kovalenko
14
NUCLOTRON IONS THE ION SOURCE TYPE
DUOPLASMATRON
LASER The ions are extracted from plasma
KRION ionization of neutral gas by electron
impact. E.D.DONETS
ROUND TABLE DISCUSSION, JINR, Dubna, July 7-9,
2005.
A.D. Kovalenko
15
NUCLOTRON HEAVY ION INJECTION CHAIN
LIMITATION by KRION higher charge
state lower intensity
LIMITATION by LU-20
Z/A gt 0.3
LIMITATION by the NUCLOTRON
single-turn injection ( 8.3 mks )
ROUND TABLE DISCUSSION, JINR, Dubna, July 7-9,
2005.
A.D. Kovalenko
16
Reaching 5 Gev/u for heavy ions ( A 200)
pc(GeV/cu) 0.3B?(z/A) (Tm), where ?
L(B)N/2p
Operation of the magnetic system at B gt 2.2 T
make it possible T 6.527 for z/A0.5. Thus,
the lower limit for z/A 0.383

• The number of dipoles in the Nuclotron ring, N
  96
• L(_at_2T) 1.396 m, ? 29.917 m and pc
  12.55(z/A)
• L(_at_2.2T) 1.385 m,? 21.17 m and pc 13.96(z/A)

ROUND TABLE DISCUSSION, JINR, Dubna, July 7-9,
2005.
A.D. Kovalenko
17
NUCLOTRON HEAVY IONS
INCREASING of B UP TO 2.2 T IS NOT IMPOSSIBLE AT
THE NUCLOTRON
ROUND TABLE DISCUSSION, JINR, Dubna, July 7-9,
2005.
A.D. Kovalenko
18
NUCLOTRON HEAVY IONS
THE PROBLEM IS TO REACH 5 GeV/u for U ions
within the existing injection scheme
THE MAGNETIC FIELD MORE THAN 2.2 T IN DIPOLES IS
NECESSARY IN THIS CASE
ROUND TABLE DISCUSSION, JINR, Dubna, July 7-9,
2005.
A.D. Kovalenko
19
KRION ION SOURCE DEVELOPMENT
TRADITIONAL SOURCE CAN PROVIDE HEAVY IONS LIKE
Xe(44), Bi(72) WITH THE INTENSITIES OF 10E7
FAST REALIZATION OF the NEW APPROACH TO THE ION
SOURCE CONSTRUCTION (TURBULAR ELECTRON BEAM) IS
NECESSARY TO INCREASE THE INTENSITIES BY A FACTOR
OF 100. ESTIMATED COST OF THE WORKS IS 170-200 k
for 2005-2007.
ROUND TABLE DISCUSSION, JINR, Dubna, July 7-9,
2005.
A.D. Kovalenko
20
KRION ION SOURCE DEVELOPMENT
The ionization energies of some of heavy elements
Operating range of the existing ion source
(marked with yellow)
Necessary range of the new ion source (marked
with green)
RNP2005, May 23-28, 2005, Dubna
ROUND TABLE DISCUSSION, JINR, Dubna, July 7-9,
2005.
A.D. Kovalenko
21

NUCLOTRON DEVELOPMENT PLANS
THE PROGRAMME APPROVED in 2000
ROUND TABLE DISCUSSION, JINR, Dubna, July 7-9,
2005.
A.D. Kovalenko
22
ROUND TABLE DISCUSSION, JINR, Dubna, July 7-9,
2005.
A.D. Kovalenko
23
ILLUSTRATIONS
ROUND TABLE DISCUSSION, JINR, Dubna, July 7-9,
2005.
A.D. Kovalenko
A.D. Kovalenko
24

EXTRACTED BEAM PROFILES
Extracted beam profiles
RNP2005, May 23-28, 2005, Dubna
ROUND TABLE DISCUSSION, JINR, Dubna, July 7-9,
2005.
A.D. Kovalenko
25

EXTRACTED BEAM SPILL
BEAM SPILL up to 10s IS POSSIBLE
ROUND TABLE DISCUSSION, JINR, Dubna, July 7-9,
2005.
A.D. Kovalenko
26
NUCLOTRON THE ELEMENTS
INTERNAL TARGET and the OTHER EQUIPMENT at the
WARM STREIGHT SECTION
ROUND TABLE DISCUSSION, JINR, Dubna, July 7-9,
2005.
A.D. Kovalenko
27
NUCLOTRON EXISTING BEAM LINES
ROUND TABLE DISCUSSION, JINR, Dubna, July 7-9,
2005.
A.D. Kovalenko
28
NUCLOTRON BOOSTER RING
Parameter NUCLOTRON BOOSTER
Peak energy, GeV/u 6 0,5
Repetition rate, Hz 0.5-1 1(3)
Magnetic field, T 2 1.2
Aperture, h ? v, cm2 5.5 ? 11.0 10 ? 16
Circumference, m 251.5 83.5
Operating temp, K 4.5 4.5 / 80
Number of dipoles 96 32
Number of quads 64 24
PROTON, DEUTERON INTENSITIES N (1-2)1013
p/cycle
ROUND TABLE DISCUSSION, JINR, Dubna, July 7-9,
2005.
A.D. Kovalenko