1. A.Sidorin, on behalf of the team PP PAC, JINR, Dubna, 16 January 2017
Nuclotron:
results of the 52nd, 53rd and 54th runs
A.Sidorin, on behalf of the team
PP PAC, JINR, Dubna, 16 January 2017

2. Contents Statistics of the Nuclotron operation Machine development
- dynamics optimization
- diagnostics development
Preparation for and Booster construction

3. Statistics of operation
Run #52 “technological” (650 h)
RFQ fore-injector commissioning (first stage)
Injection complex status, Anrdey Martynov
SPI commissioning
Test of polarimeters:
after LU-20, at Internal target, at extracted beam
Test of the Booster power supply prototypes at SC load
Test of White Rabbit segment at
Improvement of beam line current stability

4. Statistics of operation
Run # (1400 h)
SPI optimization, polarimetry
Spin physics experiments
Test of and MPD elements
Test of the Booster power supply prototypes
with beam acceleration
Stochastic cooling, diagnostics, adiabatic capture

5. Run #53 Routine operation of SPI and new fore-injector
Polarized deuteron acceleration:
Intensity 25*108
8e8
Deuteron Spin Structure experiment, internal target

6. Statistics of operation
Run # (1010 h)
Acceleration of polarized and unpolarized deuterons and protons
Acceleration of carbon and lithium ions from laser source
Maximum extracted beam energy 5.2 GeV/u (1.85 T)

7. Adiabatic capture
RF Voltage
vs time
Capture efficiency ~ 70%
8e8
6e8

8. Adiabatic capture Routine operation during run #54
RF Voltage
vs time
Capture efficiency ~ 70%
Routine operation during run #54
with injection at magnetic field plateau
+ adiabatic capture
8e8
6e8

9. Slow extraction
Run #54, carbon ions, 5.2 GeV/u, VESS = 145 kV

10. Slow extraction
Run #54
Evolution of the longitudinal Schottky at 1913 harmonics during 5 s of extraction
Run #54 – RF knock- out using diagnostic kicker was tested

11. Q-meter RF and Pick-up signal synchronization
Single-bunch excitation and measurements
3D (Direct Diode Detection)
Sensitivity down to 1e8 elementary charges
Accuracy Q <
Diagnostic kicker
Report by E.Gorbachev, V.Volkov
Beam diagnostics at the NICA
17:00

12. Diagnostics: bunch tomography
The particle distribution in the longitudinal phase plane
E/E
t/TRF

13. Diagnostics: bunch tomography
The particle distribution in the longitudinal phase plane
a few ms after injection E 

14. White rabbit: test at BM@N
First test:
Run #52
bld. 201
~ 1.5 km
bld. 2
bld. 205
Report by E.Gorbachev, V.Slepnev
NICA control system
16:30

15. Preparation for BM@N, beam lines
Nuclotron to beam line:
26 elements of magnetic optics:
→ 8 dipole magnets
→ 18 quadruple lenses
Building 205
Nuclotron
~160 m

16. Improvement of the beam line current stability
Run #52
Prototype of the current control unit
Long-range relative current stability of 50 КВ source is better than 10-3.
Ripple at 300 Hz 0.5…1% (depending on output current). (Run #52)

17. New source at the beam line
Run #53
dipole magnet
(СП 57)
ИП LM Invertor (Moscow)
600 A, 180 V, ripple 10-4

18. The Booster power supply system
Consists of three powerful units:
Main source 180 V, 12 kA
Additional sources for quadrupole lenses
25 V, 400 A and 15 V, 300 A
Three companies participate in the tender:
LM Invertor (Moscow)
EVPUas (Slovak Republic)
Frako-term (Poland)

19. The Booster power supply
LM Invertor (Moscow)
EVPUas (Slovak Republic)
Frako-term (Poland)
Prototypes are under the test during the Run #52
Operation on SC load for Quadrupole supply
(instead of 37 TV JINR)

20. The Booster power supply
Three companies participate in the tender:
LM Invertor (Moscow)
EVPUas (Slovak Republic)
Frako-term (Poland)
Prototypes are under the test during the Run #52
Operation on SC load for Quadrupoles supply
(instead of 37 TV JINR)
Up to 600 A
Dynamic behaviors
Ripple level at the plateau

21. The Booster power supply
Three companies participate in the tender:
LM Invertor (Moscow)
EVPUas (Slovak Republic)
Frako-term (Poland)
Prototypes are under the test during the Run #52
Operation on SC load for Quadrupoles supply
(instead of 37 TV JINR)
IP600-80D (600 A)

22. The Booster power supply
Three companies participate in the tender:
LM Invertor (Moscow)
EVPUas (Slovak Republic)
Frako-term (Poland)
Prototypes are under the test during the Run #52
Operation on SC load for Quadrupoles supply
(instestead 37 TV JINR)
PS600 (600 A)

23. The Booster power supply
PS-1000 (1kA)
Three companies participate in the tender:
LM Invertor (Moscow)
EVPUas (Slovak Republic)
Frako-term (Poland)
Prototypes are under the test during the Run #52
Operation on SC load for Quadrupoles supply
(instead of 37 TV JINR)

24. The Booster power supply system
Prototypes were tested
Run #52: Operation on SC load
Run #53: Beam acceleration:
LM Invertor
EVPUas
Frako-term unit is transferred
to Facility for SC Magnets Assembling and Cryogenic Tests

25. Thank you for attention

26. Run #53 (longest at Nuclotron)
Time distribution
Cooling, 7.3%
Tuning, 8.7%
Repairs, 4%
Machine
development
NICA R&D (24%),
Experiments
Unexpected losses, 2.5%
77.6%
Polarized, unpolarized deuterons, maximum energy of extracted beam 4.6 GeV/u