Development of control system for JUNA ion source

Table 1. Requirements of JUNA ion source
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Table 1. Requirements of JUNA ion source
beam energy/kV RF/GHz number of extraction electrodes emittance/ (π·mm·mrad) beam current/mA
H⁺ He⁺ He²⁺
50 2.45&14.5 3 ≤0.2 10 6 ～2.5

Table 2. Record for high-voltage setting

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Table 2. Record for high-voltage setting

EPICS record for high-voltage power supply
record (ao, "ECR_PS:HV_01:Vset") { 　　 field (DTYP, "S7PLC") 　　 field (EGUL, "0") 　　 field (EGUF, "10") 　　 field (OUT, "@Testsystem:0/2 'T=INT16 L=0 H=27648' ") 　　 field (LINR, "LINEAR") 　　 field (PINI, "YES") 　　 field (ASLO, "6.0") 　　 field (EGU, "kV")}

Table 3. Definition of mw control

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Table 3. Definition of mw control

definition of record type for mw

definition of struct for mw

recordtype(mw) { 　　 include "dbCommon.dbd" 　　 field(Vmon,DBF_DOUBLE) { 　　　　 promptgroup(GUI_INPUTS) 　　　　 asl(ASL0) 　　　　 pp(TRUE) 　　 } 　　 field(FilaImon,DBF_DOUBLE) { 　　　　 promptgroup(GUI_INPUTS) 　　　　 asl(ASL0) 　　　　 pp(TRUE) 　　 }……}

typedef struct mwRecord { 　　 char name[61]; /* Record Name */ 　　 char desc[41]; /* Descriptor */ 　　 char asg[29];/* Access Security Group */ 　　 epicsEnum16 scan;/* Scan Mechanism */ 　　 epicsFloat64 vmon;/* HV Voltage Value */ 　　 epicsFloat64 filaimon; /* Fila Current Value */ 　　 …… 　　 char ip[16]; /* IP address */ 　　 epicsInt32 port; /* port */} mwRecord;

Table 4. Rules of interlock protection

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Table 4. Rules of interlock protection

condition of interlock	action
ecrVac ＞ 1 Pa or lebtVac ＞ 1 Pa or rgVac ＞ 200 Pa	bias HV, extraction HV, HV volt and curr of mw are set to 0, interlock of extraction HV opens, FC1 and FC2 push in
biasCurr ＞ 2 mA	extraction HV, HV volt and curr of mw are set to 0, FC1 and FC2 push in
the temperature and pressure of the water are contrary to the thresholds	the solenoid power supply is set to 0, dipole power supply is set to 0 and off, FC1 and FC2 push in, mw interlock, molecular pump controller is set to off
enabled is false	bias HV, extraction HV, parameters of mw are set to 0, FC1 and FC2 push in
vacuum of accelerator is abnormal or stop beam is true	bias HV, extraction HV, HV volt and curr of mw are set to 0, interlock of extraction HV and mw open, FC1 , FC2 push in, delay 200 ms, valve closes
dipole power supply is off or the readback of it is zero	FC1 push in

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Pengpeng Wang, Wei Zhang, Qi Wu, Shi An, Min Yue, Jianjun Chang, Jingrui An. Development of control system for JUNA ion source[J]. High Power Laser and Particle Beams, 2023, 35(10): 104001

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