1. Pellet target developments at ITEP
A.Gerasimov, V.Chernetsky, M.Büscher, P.Fedorets, A. Kantsyrev, E. Lushchevskaia, V. Panyushkin, A. Bogdanov, A.Dolgolenko, P.Balanutsa, E.Ladygina, L.Gusev, S.Mineev, I.Tarasenko, V. Demekhin, S.Makagonov, D.Bogachenko, N.Kristi, V.Karasev
Institute for Theoretical and Experimental Physics named by A.I. Alikhanov of National Research Centre «Kurchatov Institute» Moscow, Russia
PANDA Meeting, Darmstadt, March 05-09, 2018

2. Current activities
Data acquisition system for target (present version)
New software for delay and piezo generators
Advanced data acquisition with PLC (first test)
LED backlighter + multi-pulse mode
Development of the adjustment system
Data analysis and tuning of the geometrical and thermo-physical parameters
Transfer of the first prototype from FZJ to ITEP
Preparation of the draft of the TDR

3. Data acquisition system for target (present version)
Gas flow control
Remote controlled system via TCP/IP sockets
Delphi XE2 language software for Windows PC
Local Hard disk data saving
Temperatures
Heater control
Pressure

4. New software for delay and piezo generators
Signal generator Rigol DG4202 for piezo rings
Delay generator Stanford DG645 for backlighter
Ethernet interface
Delphi XE2 software
Signal amplifier
TABOR El. 9100
Signals
10 ns – 1 ms
Delphi XE2 software
Signal to piezo rings :
Amplitude: up to ±100 V
Frequency up to 1 MHz
Piezzo Ring (installed on to holder of nozzle)
Driver for Powerful LED LUXEON V-Star

5. . . . . . Advanced data acquisition with PLC (first test)
Using of PLC (Programmable logic controllers) provide stable, autonomous readout and store of pellet target parameters to MySQL database
Delay generator
ICPDAS XPAC XP8041
PLC Controller
(Windoss Embedded + Visual Studio)
Database
TCP/IP Sockets
protocol
SQL request
Pressure readout
Pfeiffer TPG256
ICPDAS μPac 7186 (C language)
Local controllers – Heater controller
PHP, WEB interface
Delphi XE2 user programs

6. LED backlighter + multi-pulse mode
Parameters
MOSFET driver scheme
Powerful LED LUXEON V-Star (800mW)
Min exposure: 100 ns
Power supply 30 V
5 pulses with duration 300 ns each,
repetition rate 1 MHz
Posibility of visualisation of pellet movement at one image
Light signals obtained by Hamamatsu R760 photomultiplier
Lenses -Sigma DG APO Macro 180 mm f/ 2.8

7. Development of the adjustment system
Idea:
MDC Vacuum BLM UHV linear actuator (proposed)
Movement by stepper motors, 3 µm linear steps
Onitex OSM-42R controller

8. Development of the adjustment system
Present system of linear actuator + stepper motor operated via L-CARD E controller is prepared for tests
Linear actuator
Stepper motor

9. Development of the adjustment system
two options for fixation of the sluice are under study: lower end (on the membrane) or upper end (on the bottom of triple point chamber (TPC))
Lower end on membrane
upper end on bottom of TPC
Triple point chamber (TPC)

10. Data analysis
Determination of the droplet velocity in the triple point chamber
Profile of the droplet stream Z
Distance droplet-droplet, μm
Example from tests in 2018
f=445 kHz
Z , μm
droplet velocity = average distance x f ≈ 33 m/s

11. Transfer of the first prototype from FZJ to ITEP
Tax free permission is obtained from the Russian government in beginning of February The procedure takes one year.
The negotiations with the transport companies for the preparation of the tender is going on.
The transfer is planned in the middle of April 2018
With the parts from the first prototype the configuration of the second prototype will be completed
Preparation of the draft of the TDR
Writing of the draft of the Pellet target TDR is going on.
The prototype is not completed. Some tests for TDR can not be performed. Waiting for transfer from FZJ.
R&D studies are not finished. Some results are still absent.