JPH0711761B2 - Parameter adjustment system - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a parameter adjustment system used in a system in which a measurement amount changes depending on a plurality of parameters, and particularly, to maximize beam extraction efficiency. The present invention relates to a beam adjusting system for a cyclotron that adjusts a beam current.

[Prior Art] A cyclotron is composed of many devices such as an electromagnet and a high-frequency device, and at the start of operation, it is necessary to finely adjust many parameters of many devices to maximize beam extraction efficiency. .

Therefore, in the conventional cyclotron, the operator selects 2 to 4 parameters from the many adjustment parameters using the adjustment panel and adjusts them using the adjustment knob while looking at the beam current display. There is.

[Problems to be Solved by the Invention] However, the adjustment work is not easy because the number of adjustment parameters required to be adjusted in the cyclotron is as large as 20 to 50 and there is mutual interference between the parameters. Further, since there is no apparatus for directly measuring the beam trajectory, it is necessary to pay attention to only the amount of change in the beam current and select the adjustment parameter by trial and error. A skilled operator adjusts the above-mentioned adjustment work with intuition, and it is extremely difficult to extract all adjustment rules in an interview.

Due to these shortcomings, adjustment work of the cyclotron required skill and automation was considered difficult.

Therefore, an object of the present invention is to provide a parameter adjustment system that allows even an unskilled person to easily perform parameter adjustment.

Another object of the present invention is to provide a parameter adjusting system for adjusting the beam current of a cyclotron.

[Means for Solving the Problem] According to the present invention, in a parameter adjustment system used in a system in which a predetermined measurement amount changes depending on a plurality of parameters, the values of the respective parameters and the plurality of parameters are set. When the is adjusted, the storage means for sequentially and automatically storing the name and the adjustment amount of the adjusted parameter as an adjustment procedure, and the extraction of analyzing the adjustment procedure stored in the storage procedure and extracting the rule relating to the adjustment procedure There is provided a parameter adjustment system including: a device and a presentation device that presents the adjustment procedure of the measurement amount based on the rule regarding the adjustment procedure.

EXAMPLES Next, the present invention will be described in more detail with reference to the drawings showing an example of the present invention.

Referring to FIG. 1, one embodiment of the present invention is to adjust the parameters such that an electromagnet power source, a high frequency device, etc.
The cyclotron control device 5 that adjusts the beam current so that the beam extraction efficiency of the cyclotron device 8 including various devices is maximized, and the beam adjustment in the cyclotron control device that is connected to the cyclotron control device 5 via the communication line 9 is performed. It is composed of a cyclotron support device 15 for supporting.

In the cyclotron controller 5, the operator 1 looks at the beam current display 4 and uses the adjustment parameter selection panel 2 to select a single or
Select ~ 4 parameters and adjust them using the adjustment knob 3. The cyclotron control device 5 gives the parameter setting value 6 to the cyclotron device 8 and receives the current parameter value 7 from the cyclotron device 8.

In the case of the cyclotron shown in the figure, the measured amount is only the beam current, and therefore parameters having a relatively high adjustment frequency are sequentially selected to obtain the maximum value of the beam current. The operator 1 assumes that the relation between each parameter and the beam current is a unimodal function, and scans the parameters to perform a search for obtaining the maximum value of the beam current.

Skilled operator 1's adjustment operations are automatically sent from the cyclotron control system 5 to the cyclotron support system 15 via the communication line 9 in sequence. Specifically, the name of the parameter adjusted by the skilled operator 1 and the adjustment amount of the parameter are given to the cyclotron support system 15. As a result, the cyclotron support system 15 is provided with data regarding a series of adjustment operations from the start of adjustment to obtaining the optimum beam current. The parameters of 20-50 cyclotrons are, for example, main magnetic field (MAG), quadrupole magnetic field (Q), high-frequency device (R
F) and deflector (DEF) can be divided into parameters, and if these divisions alone can be specified,
It can be a great guide for unskilled people.

Cyclotron support system 15 is a skilled operator 1
This is for analyzing the adjustment operation regarding the operation according to a predetermined rule so that the operation content can be used by a person other than an expert. The above-mentioned data regarding the adjusting operation of the skilled operator 1 is provided in the cyclotron support system 15
Are sequentially stored in the adjustment procedure storage circuit 10 and are used to create the adjustment procedure time series database 13. The rules used when creating the database 13 are as follows.

The parameters of the cyclotron are not necessarily adjusted one by one, and a plurality of parameters may be adjusted simultaneously. Therefore, in addition to the rule for dividing the parameters into the above four groups, in this embodiment,
Rules are also provided for combinations of multiple adjustment parameters to be adjusted at the same time. In this way, when divided into groups, rules regarding procedures within groups and procedures between groups are also required.

The data regarding the adjusting operation is sequentially analyzed according to the above-mentioned rules, and the database 13 is created.

The procedure analysis circuit 13 analyzes the contents of the adjustment procedure time series database 13, extracts some adjustment rules, and the adjustment rule database 14 is created and updated. The contents analyzed by the procedure analysis circuit 13 are obtained by the combination and frequency of parameter pairs to be adjusted simultaneously, the grouping of parameters to be adjusted continuously, the adjustment procedure and frequency between the groups obtained in, and The adjustment procedure and frequency between groups.

When grouping the adjustment parameters, parameters that are deeply related in the adjustment procedure are extracted from the obtained adjustment procedure data based on the appearance frequency. The most related simultaneous operation and continuous operation are extracted not only with two parameter pairs but also with, for example, a three-parameter and four-parameter continuous operation, and a parameter connection graph is created. The procedure is as follows.

(1) Extract parameter pairs for simultaneous operation.

(2) Of continuous operations, a pattern equivalent to simultaneous operation is converted into a parameter pair for simultaneous operation.

(3) Extract continuous operations of two parameters that appear frequently.

(4) The same processing as (3) above is sequentially applied to the three-parameter continuous operation and the four-parameter continuous operation until there is no continuous operation having a high appearance frequency.

(5) With respect to the parameter group extracted in the above (1) to (4), the parameter name is represented as a graph, and the simultaneous operation and the continuous operation are represented as edges to create a parameter continuous relationship graph.

Group division is performed by focusing on the discontinuity graph of the parameter continuity graph, the cutting points and bridges that do not generate trivial blocks.

The inter-group procedure consists of two groups, eg group A
Extract the degree of dependency between B and B. Here, the degree of dependency of group B on group A can be calculated by referring to the transition frequency from group A to B, and if the degree of dependency is high, group B may be adjusted subsequent to group A. Since there are many, it is considered to be in a subordinate relationship.

The above-described transition adjusts the group A to adjust the dependent group B if the beam current increases, and otherwise adjusts the other groups. If the beam current is increased by adjusting the group B, the operating point is changed. Therefore, the operation returns to the group A to perform the adjustment, and if not, the adjustment of another group is performed.

Those with relatively large frequency values are [Q, MAG] [DEF, MAG]
[RF, MAG], and this result shows that the MAG group is a group with lower independence than the other groups. Therefore, the basic intergroup procedure is Q, DEF,
Then, a pattern for adjusting MAG after RF and RF may be taken.
If the group formed by combining the Q, DEF, RF group and the MAG group is [Q ', DEF', RF '], four groups can be combined into three groups.

The adjustment procedure presentation circuit 12 presents the operator with the next adjustment procedure based on the data of the adjustment rule database 14. If the next parameter to be adjusted cannot be uniquely determined, some candidates are presented to assist the operator in selection.

Of the above three functions, the adjustment procedure collection / recording circuit 10 and the adjustment procedure presentation circuit 12 need to operate in real time while the cyclotron is operating, but the procedure analysis circuit 11 may be off-line processing. .

Further, when the control system 5 has a sufficient processing capacity, the control system 5 and the support system 15 can be configured by the same computer. In that case, communication line 9
Is unnecessary.

[Effects of the Invention] As described above, according to the present invention, it is possible to provide a parameter adjustment system in which even an unskilled person can easily perform parameter adjustment.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention. 1 ... operator, 2 ... adjustment parameter selection panel,
3 ... Adjustment knob, 4 ... Beam current display, 5 ... Cyclotron control device, 6 ... Parameter setting value, 7 ...
Current parameter value, 8 ... Cyclotron device, 9 ...
Communication line, 10 …… Adjustment procedure collection / storage circuit, 11 …… Procedure data analysis circuit, 12 …… Adjustment procedure presentation circuit, 13 …… Adjustment procedure time series database, 14 …… Adjustment rule database, 15 …… Cyclotron support Device, 16 ... Display for showing adjustment procedure.

Claims (2)

[Claims] 1. A parameter adjustment system used in a system in which a predetermined measurement amount changes depending on a plurality of parameters, and when the values of the respective parameters and the plurality of parameters are adjusted, the adjusted parameters A storage means for automatically and automatically storing the name and the adjustment amount as an adjustment procedure, and analyzing the adjustment procedure stored in the storage means,
A parameter adjustment system comprising: an extraction unit that extracts a rule regarding an adjustment procedure; and a presentation unit that presents the adjustment procedure for the measured amount based on the regulation regarding the adjustment procedure. 2. The extracting means analyzes the adjustment procedure,
Combination and frequency of parameter pairs to be adjusted at the same time, grouping of continuously adjusted parameters, adjustment procedure and frequency between the grouped groups, and frequency of the adjustment procedure within each grouped group The parameter adjustment system according to claim 1, wherein the parameter adjustment system is performed according to the following.