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A.Masiello – Colloquium on the ITER-CODAC Plant Control Design Handbook - 27-28 October, Barcelona 1 The ITER Neutral Beam injectors Antonio Masiello.

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Presentation on theme: "A.Masiello – Colloquium on the ITER-CODAC Plant Control Design Handbook - 27-28 October, Barcelona 1 The ITER Neutral Beam injectors Antonio Masiello."— Presentation transcript:

1 A.Masiello – Colloquium on the ITER-CODAC Plant Control Design Handbook October, Barcelona 1 The ITER Neutral Beam injectors Antonio Masiello

2 A.Masiello – Colloquium on the ITER-CODAC Plant Control Design Handbook October, Barcelona 2 Ion source Neutraliser Residual ion Dump (RID) Accelerator Plasma Neutral Beam injection: principles D beam

3 A.Masiello – Colloquium on the ITER-CODAC Plant Control Design Handbook October, Barcelona 3 The configuration of the NB injectors in ITER

4 A.Masiello – Colloquium on the ITER-CODAC Plant Control Design Handbook October, Barcelona 4 The Neutral Beam injector

5 A.Masiello – Colloquium on the ITER-CODAC Plant Control Design Handbook October, Barcelona 5 The NB injector POWER SUPPLY BEAM SOURCE BEAM LINE POWER SUPPLY INPUT POWER toPLASMA NEUTRALISER CALORIMETER RID ION SOURCE DUCT 0.6 POWER SUPPLY BEAMBEAM LINE OTHER COMPONENTS TRANSMISSION LINE ACCELERATOR INPUT POWER toPLASMA SOURCE Power delivered to the plasma per injector16.5 MW Beam energy1 MeV Ion speciesD-D- Accelerated ion current at the grounded grid40 A Average accelerated ion current density at the grounded grid200 A/m 2 Current density uniformity over the extraction area 10 % Pulse length 3,600 s NB Power balance and main specifications

6 A.Masiello – Colloquium on the ITER-CODAC Plant Control Design Handbook October, Barcelona 6 The ion source Rear view of the RF ion source Half size ion source test facility Courtesy of IPP-Garching

7 A.Masiello – Colloquium on the ITER-CODAC Plant Control Design Handbook October, Barcelona 7 The MAMuG accelerator 1280 apertures 4 segments x 4 groups, 5x16 apertures in a group 1MV accelerator 5 stages of 200kV 1 segment

8 A.Masiello – Colloquium on the ITER-CODAC Plant Control Design Handbook October, Barcelona 8 The Beam Line Components Neutraliser RID Calorimeter ComponentNeutraliserRidCalorimeter Max heat load [MW] Max PD [MW/m 2 ] Max water flow [Kg/s] The beam line components

9 A.Masiello – Colloquium on the ITER-CODAC Plant Control Design Handbook October, Barcelona 9 The NB high vacuum pumping Neutraliser 1 module with 4 sections in parallel Cryopanel: 4.6K supercritical He Shielding: 80K gaseous He 1 section

10 A.Masiello – Colloquium on the ITER-CODAC Plant Control Design Handbook October, Barcelona 10 The Power supplies

11 A.Masiello – Colloquium on the ITER-CODAC Plant Control Design Handbook October, Barcelona 11 The Power supplies

12 A.Masiello – Colloquium on the ITER-CODAC Plant Control Design Handbook October, Barcelona 12 Neutral Beam Test Facility at Padua - Italy The main risk mitigation measure for resolving NB issues The NBTF lay-out reproduces the one of the ITER NB-1 A full size source to start in 2012 A full neutral beam line to start in 2014

13 A.Masiello – Colloquium on the ITER-CODAC Plant Control Design Handbook October, Barcelona 13 Global operating states Construction and Long Term Maintenance (LTM) Short Term Maintenance (STM) Test and Conditioning Operation (TCS) Cryopump regeneration at 400 K Cryopump cool-down Cryopump warm-up to ambient temperature HV conditioning over extraction and acceleration grids ion source plasma without extraction ion beam accelerated ion beam neutralized residual ion dump active Short Term Stand-by (STS) Cryopump regeneration at 100 K Pulse Operation State (POS) Beam on calorimeter Beam on target without plasma Beam on target with plasma: beam normal operation of in ITER pulse. Beam is interlocked (e.g. tokamak plasma density)

14 A.Masiello – Colloquium on the ITER-CODAC Plant Control Design Handbook October, Barcelona 14 Control system main parameters The NB Injector Control System will control the following main parameters: Power to the RF driver Plasma grid current Bias Voltage Extraction grid voltage Acceleration grids voltages Residual Ion dump biasing Caesium oven temperature Gas flows Fast shutter control (and absolute valve) Beam on/off-axis injection Magnetic compensation coil current …

15 A.Masiello – Colloquium on the ITER-CODAC Plant Control Design Handbook October, Barcelona 15 Control system preliminary architecture (NBTF) CSSCentral Safety System CISCentral Interlock System PSSPlant Safety system PISPlant Interlock System Courtesy of the RFX Association

16 A.Masiello – Colloquium on the ITER-CODAC Plant Control Design Handbook October, Barcelona 16 Main acquisition requirements The data acquisition system of each NB Injector will include the instrumentation needed to condition, record, display and analyze the measured signal coming from the beam line Standard analog inputs to CODACsome thousands Standard digital inputs to CODACabout 100 Standard digital outputs from CODACabout 100 Timing outputs from CODACfew Temperature measurements Status signals Gas pressure meas. Residual pressure meas. B field (static) meas. Position transducers Water and gas flow meas. …… Most of the signals sampling speed is Hz For higher speeds up to MHz, a baseline speed of KHz is foreseen and an event driven acquisition with a window of few ms to acquire the signal up to some MHz Fastest interlock 100 s

17 A.Masiello – Colloquium on the ITER-CODAC Plant Control Design Handbook October, Barcelona 17 References ITER neutral beam heating and current drive system 2001 Design Description Document N53 DDD V. A., Final reports, EFDA contract: TW6-THHN-NBD1 A. Luchetta et al., Final report - Preliminary specification of the architecture of the control, interlock and safety systems for the NB test facility - EFDA contract: TW6-THHN-NBTF1 Plant control design handbook https://user.iter.org/?uid=27LH2V&version=v3.0 Systems Requirement Document (SRD) NBH and CD PBS 53 L. Svensson, private communication


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