JP4487313B2 - Electromagnet alignment method and alignment system - Google Patents

Description

The present invention is provided in proton accelerator, to adjust the position and posture of the electromagnet for controlling the electron trajectory, it relates to an electromagnet alignment method and alignment system for proton beam accelerator.

In the proton beam accelerator, for example, a plurality of deflection electromagnets and quadrupole electromagnets are continuously installed for controlling the electron trajectory. In this case, each electromagnet needs to be accurately aligned with respect to the electron trajectory. Therefore, in such a proton beam accelerator, alignment is achieved by various methods (for example, Patent Document 1 and Patent Document 2).

In the proton beam accelerator disclosed in Patent Literature 1 and Patent Literature 2, a bolt for adjusting the electromagnet in the horizontal direction (X, Y direction) and a bolt for adjusting the electromagnet in the vertical direction (Z direction) are installed. The electromagnet is aligned.
JP-A-6-163197 JP 11-214198 A

  By the way, in the alignment methods disclosed in Patent Document 1 and Patent Document 2, a plurality of adjustment bolts considered to be necessary are rotated while confirming the position of the electromagnet based on the building reference point provided in the building, and the electromagnet Alignment is performed. However, in such an alignment method, since the position and the adjustment amount of the adjustment bolt to be moved to the regular position are not clear, the trial and error are repeated, and an enormous amount of time is required for the work.

The present invention has been made to solve such a problem, and an object thereof is to provide an alignment method and an alignment system for an electromagnet for a proton beam accelerator that can be easily and quickly completed.

  To achieve the above object, the present invention provides an adjustment mechanism for adjusting the position and orientation of an electromagnet with a plurality of adjustment bolts, measurement reference points provided at a plurality of locations on the electromagnet, and a building on which the electromagnet is installed. A measurement device that is installed in any place indoors and measures the position of the measurement reference point; and an analysis device that calculates adjustment amounts of the plurality of adjustment bolts that adjust the electromagnet to a normal position, By measuring the position of the measurement reference point, the adjustment amount is calculated for each of the adjustment bolts, and by moving the adjustment bolts to the calculated adjustment amount, the electromagnet is moved to a normal position. Features.

  The adjustment amount is calculated for each adjustment bolt based on the position variation amount measured for each adjustment bolt by measuring the position variation amount of the measurement reference point when the adjustment bolt is moved by a predetermined amount. It is characterized by doing.

  Further, the adjustment bolt includes an actuator for rotating the adjustment bolt, and the actuator is operated by a command from the analysis device.

  According to the present invention, the electromagnet is moved in the horizontal direction and the vertical direction by the adjusting bolt. Measurement reference points are provided at a plurality of locations on the electromagnet, and the positions of the measurement reference points are measured by a measurement device installed at the building reference point.

  One of the plurality of adjustment bolts is moved by a predetermined amount, the fluctuation amount of the measurement reference point is measured, and the moved adjustment bolt is returned to the original position. In the same manner, the amount of change in the measurement reference point when the predetermined amount is moved in all the adjustment bolts is measured. Based on the measurement result of the fluctuation amount of each adjustment bolt, the analysis device calculates the adjustment amount of each adjustment bolt that adjusts the electromagnet to the normal position. The electromagnet is moved to a normal position by moving each adjustment bolt by the calculated adjustment amount.

As a result, the position of the adjustment bolt that needs to be adjusted and the adjustment amount become clear, and the electromagnet for the proton beam accelerator can be easily aligned without repeating trial and error.

  In addition, since the adjustment bolt is provided with an actuator to be rotated, it is possible to automatically perform an operation of moving the electromagnet to a regular position from the calculation of the adjustment amount.

As described above, according to the proton magnet accelerator electromagnet alignment method and alignment system of the present invention, the position and amount of adjustment bolts necessary for electromagnet alignment are clarified, and the electromagnet alignment work is simple and short. It takes time.

Hereinafter, an alignment method and an alignment system for an electromagnet for a proton beam accelerator according to the present invention will be described with reference to the accompanying drawings.

1 is a schematic diagram conceptually showing an alignment system for a proton beam accelerator according to the present invention, FIG. 2 is a schematic diagram for explaining how to measure and adjust an amount by a three-dimensional measuring apparatus, and FIG. 3 is an alignment system. It is the flowchart which showed the operation | movement of.

As shown in FIG. 1, the proton beam accelerator is provided with an electromagnet 1 such as a deflection electromagnet or a quadrupole electromagnet for controlling the electron trajectory.

  An adjustment mechanism 5 that adjusts the position and orientation of the electromagnet 1 is provided below the electromagnet 1. The adjustment mechanism 5 includes adjustment bolts L1 to L4 for adjusting the electromagnet 1 in the vertical direction (Z direction), and adjustment bolts L5, L6, L7, and L8 for adjustment in the horizontal direction (X direction and Y direction). Is provided.

  Actuators A1 to A8 (not shown) such as motors are installed on the adjustment bolts L1 to L8, respectively. Three measurement reference points P1, P2, and P3 are disposed on the upper surface of the electromagnet 1.

A measurement reference point 2 is provided at any location in the building where the proton beam accelerator is installed, and a three-dimensional measurement device that measures the three-dimensional position of the object using a laser or the like on the measurement reference point 2 3 (hereinafter referred to as a measuring device) is installed. The measuring device 3 is connected to an analyzing device 4 installed in the vicinity of the measuring device 3 or anywhere in the building. The analysis device 4 is also connected to the actuators A1 to A8 and controls the operations of the actuators A1 to A8.

  Next, in FIG. 2, a calculation method of the adjustment amount divided into the vertical and horizontal directions of the electromagnet 1 is shown. By moving one of the adjusting bolts L1 to L8 by a certain amount, the posture of the electromagnet 1 changes uniformly. As a result, the posture variation of the electromagnet 1 with respect to each variation of the adjustment bolts L1 to L8 has a certain reproducibility and holds as a determinant.

With respect to the X, Y, and Z axes assumed in the building where the proton accelerator is installed, the horizontal movement amount of the electromagnet 1 to the normal position is X, Y, and the vertical movement amount is Z. Furthermore, when the rotation angles when rotating with respect to the X, Y, and Z axes are θx, θy, and θz, the movement amount of the electromagnet 1 to the regular position is (X, Y, Z, θx, θy, θz). ) At this time, the adjustment amount of each of the adjustment bolts L1 to L8 for moving the electromagnet 1 in the shortest time is obtained from the generalized inverse matrix of the above matrix.

  First, the calculation method of the adjustment amount of each adjustment bolt L1 to L4 in the vertical direction will be described.

Each coordinates of the measurement reference points _{P1, P2, P3 P1: P} 10 (x 10, y 10, z 10), P2: P 20 (x 20, y 20, z 20), P3: P 30 (x 30, y ₃₀ , z ₃₀ ) are taken into the analyzer 4. Actuator A1 is driven to move 0.5 mm adjustment bolt L1 in the upward direction.

The new coordinates of the measurement reference points P1, P2, and P3 after the posture of the electromagnet 1 is changed are P1: P ₁₁ (x ₁₁ , y ₁₁ , z ₁₁ ), P2: P ₂₁ (x ₂₁ , y ₂₁ , z _21). ), P3: P ₃₁ (x ₃₁ , y ₃₁ , z ₃₁ ) is taken into the analyzer 4.

From the coordinates of the taken measurement reference points P1, P2 and P3, the analysis device 4 uses the centroid G of the three measurement points as a temporary reference point, and the centroids G of P ₁₀ , P ₂₀ and P ₃₀ before the movement. A position variation amount G1 (z _g1 , θx _g1 , θy _g1 ) is calculated from the position to the position of the centroid G of new P ₁₁ , P ₂₁ , and P ₃₁ . After the calculation, the adjustment bolt L1 is moved 0.5 mm in the reverse direction, and the posture of the electromagnet 1 is restored.

After returning L1, the coordinates of the measurement reference points P1, P2, and P3 are again taken into the analyzer 4 as P ₁₀ , P ₂₀ , and P ₃₀ . Actuator A2 is driven and adjustment bolt L2 is similarly raised by 0.5 mm.

Measurement reference points after the posture has changed electromagnets 1 P1, P2, P3 new coordinates of _{P1: P 12 (x 12,} y 12, z 12), P2: P 22 (x 22, y 22, z 22 ), P3: P ₃₂ (x ₃₂ , y ₃₂ , z ₃₂ ) is taken into the analyzer 4. Based on the taken coordinates of the measurement reference points P1, P2, P3, the position variation amount G2 from the position of the centroid G before movement to the position of the new centroid G (z _g2 , θx _g2,. θy _g2 ) is calculated. After the calculation, the adjustment bolt L2 is moved 0.5 mm in the reverse direction, and the posture of the electromagnet 1 is restored.

After returning L2, the coordinates of the measurement reference points P1, P2, and P3 are again taken into the analyzer 4 as P ₁₀ , P ₂₀ , and P ₃₀ . Actuator A3 is driven and adjustment bolt L3 is similarly raised by 0.5 mm.

Measurement reference points after the posture has changed electromagnets 1 P1, P2, P3 new coordinates of _{P1: P 13 (x 13,} y 13, z 13), P2: P 23 (x 23, y 23, z 23 ), P3: P ₃₃ (x ₃₃ , y ₃₃ , z ₃₃ ) is taken into the analyzer 4. A position variation amount G3 (z _g3 , θx _g3 , from the position of the centroid G before the movement to the position of the new centroid G is determined by the analyzing device 4 from the coordinates of the taken measurement reference points P1, P2, P3. θy _g3 ) is calculated. After the calculation, the adjustment bolt L3 is moved 0.5 mm in the reverse direction, and the posture of the electromagnet 1 is restored.

After returning L3, the coordinates of the measurement reference points P1, P2, and P3 are again taken into the analyzer 4 as P ₁₀ , P ₂₀ , and P ₃₀ . Actuator A4 is driven and adjustment bolt L4 is similarly raised by 0.5 mm.

Measurement reference points after the posture has changed electromagnets 1 P1, P2, P3 new coordinates of _{P1: P 14 (x 14,} y 14, z 14), P2: P 24 (x 24, y 24, z 24 ), P3: P ₃₄ (x ₃₄ , y ₃₄ , z ₃₄ ) is taken into the analyzer 4. The position variation amount G4 (z _g4 , θx _g4 , from the position of the centroid G before the movement to the position of the new centroid G is determined by the analysis device 4 from the coordinates of the taken measurement reference points P1, P2, P3. θy _g4 ) is calculated. After the calculation, the adjustment bolt L4 is moved 0.5 mm in the reverse direction, and the posture of the electromagnet 1 is restored.

As described above, changes in the posture of the electromagnet 1 when the adjustment bolts L1 to L4 are moved by a predetermined amount (0.5 mm) are G1 (z _g1 , θx _g1 , θy _g1 ), G2 (z _g2 , θx _g2). , Θy _g2 ), G3 (z _g3 , θx _g3 , θy _g3 ), and G4 (z _g4 , θx _g4 , θy _g4 ), from which the Jacobian relationship J (X ₁ ) holds.

調整ボルトＬ１〜Ｌ４の調整量は、上記ヤコビアン行列の一般化逆行列を計算することで求まる。即ち、目標値に対する各調整ボルトＬ１〜Ｌ４の調整量 ＩＪ(Ｘ_１) は、以下の式で求めることが可能である。

The adjustment amounts of the adjustment bolts L1 to L4 can be obtained by calculating a generalized inverse matrix of the Jacobian matrix. That is, the adjustment amount IJ (X ₁ ) of each of the adjustment bolts L1 to L4 with respect to the target value can be obtained by the following equation.

次に、水平方向における各調整ボルトＬ５〜Ｌ８の調整量の算出方法を示す。

Next, a calculation method of the adjustment amount of each adjustment bolt L5 to L8 in the horizontal direction will be described.

  As with the calculation of the adjustment amounts of the adjustment bolts L1 to L4, the adjustment bolts L5 to L8 are calculated by driving the actuators A5 to A8 and moving the adjustment bolts L5 to L8 by a predetermined amount (for example, 0.5 mm). Let

From the coordinates of the measurement reference points P1, P2 and P3 at the original position taken into the analysis device 4 and the new coordinates of the measurement reference points P1, P2 and P3 after the posture of the electromagnet 1 is changed, the centroid G change in the attitude of the electromagnet 1 as a temporary reference point, respectively positional variation _G5 adjustment bolt _{L5~L8 (x g5, y g5,} θz g5), G6 (x g6, y g6, θz g6), G7 (x g7 , Y _g7 , θz _g7 ), G8 (x _g8 , y _g8 , θz _g8 ).

From this, the following equation holds for the Jacobian relationship J (X ₂ ).

調整ボルトＬ５〜Ｌ８の調整量は、上記ヤコビアン行列の一般化逆行列を計算することで求まる。即ち、目標値に対する各調整ボルトＬ５〜Ｌ８の調整量ＩＪ(Ｘ_２) は、以下の式で求めることが可能である。

The adjustment amounts of the adjustment bolts L5 to L8 can be obtained by calculating a generalized inverse matrix of the Jacobian matrix. That is, the adjustment amount IJ (X ₂ ) of each of the adjustment bolts L5 to L8 with respect to the target value can be obtained by the following equation.

次に、図３において、本発明に係る陽子線加速器用電磁石のアライメントシステムの動作フローを説明する。

Next, with reference to FIG. 3, an operation flow of the alignment system for the proton beam accelerator electromagnet according to the present invention will be described.

First, the coordinates of the measurement references P1, P2, and P3 on the electromagnet 1 are set to P1: P ₁₀ (x ₁₀ , y ₁₀ , z ₁₀ ), P2: P ₂₀ (from the reference point 2 by the three-dimensional measuring device 3 shown in FIG. x ₂₀ , y ₂₀ , z ₂₀ ), P3: P ₃₀ (x ₃₀ , y ₃₀ , z ₃₀ ) are taken into the analyzer 4. (Step S1).

  After the completion of capturing, the actuator A1 is driven to move the adjustment bolt L1 by a predetermined amount (0.5 mm). (Step S2).

The coordinates of the measurement references P1, P2, P3 of the electromagnet 1 whose posture has been changed from the reference point 2 by the measurement device 3 are the measurement references P1: P ₁₁ (x ₁₁ , y ₁₁ , z ₁₁ ), P2: P ₂₁ ( x ₂₁ , y ₂₁ , z ₂₁ ), P3: P ₃₁ (x ₃₁ , y ₃₁ , z ₃₁ ) are taken into the analyzer 4. (Step S3).

  From the coordinates of the measurement reference points P1, P2, P3 taken into the analysis device 4 in step S1 and the new coordinates of the measurement reference points P1, P2, P3 taken into the analysis device 4 in step S3, the centroid G The position fluctuation amount G1 is calculated as a temporary reference point. (Step S4).

  After the calculation, the actuator A1 is driven to move the adjustment bolt L1 by a predetermined amount (0.5 mm) in the direction opposite to that in Step 2, thereby returning the electromagnet 1 to the original posture. (Step S5).

Steps 1 to 5 are repeated from the adjustment bolt L1 to the adjustment bolt L8. When the operation up to the adjustment bolt L8 is completed, step S6 is executed. (Judgment A1)
A generalized inverse matrix of the Cobian matrix is calculated from the calculated position fluctuation amounts from the adjustment bolts L1 to L8, and the adjustment amounts of the adjustment bolts L1 to L8 are calculated. (Step S6).

  Actuators A1 to A8 provided on adjustment bolts L1 to L8 are driven to move adjustment bolts L1 to L8 by an adjustment amount. (Step S7).

  The measurement device 3 again measures the coordinates of the measurement references P1, P2, and P3 on the electromagnet 1 from the reference point 2. (Step S8).

  From the coordinates measured in step S8, it is determined whether the position of the electromagnet 1 has moved to a normal position. If the position has not reached the normal position, the adjustment amount up to the normal position is returned to step S6 from the coordinates measured in step S8 and readjusted. If it has reached the normal position, the adjustment work is terminated. (Decision A2).

As described above, the proton beam accelerator electromagnet alignment method and alignment system according to the present invention clarify the position and amount of adjustment bolts necessary for electromagnet alignment, and the electromagnet alignment operation is simple and short. Just do it.

  In this embodiment, the adjustment bolts L1 to L8 are moved by the actuators A1 to A8, but the adjustment bolts L1 to L8 may be moved manually.

  In addition, after adjusting the adjustment amounts of the adjustment bolts L1 to L8, when adjusting the adjustment bolts L1 to L8 manually, the coordinates of the measurement standards P1, P2, and P3 are taken into the analyzer 4 at regular time intervals, and the taken-in coordinates Alternatively, the adjustment amount may be newly calculated sequentially, and the calculated result may be notified to the operator who performs the adjustment.

  Furthermore, in the present embodiment, there are eight adjustment bolts L1 to L8, but the number of adjustment bolts may be more or less than eight according to the form of the adjustment mechanism 5.

The schematic diagram of the alignment system for proton beam accelerators which concerns on this invention. The schematic diagram for demonstrating how to obtain | require adjustment amount. The flowchart which showed operation | movement of the alignment system.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Electromagnet, 2 ... Reference point, 3 ... Three-dimensional measuring apparatus, 4 ... Analysis apparatus, 5 ... Adjustment mechanism, L1-L8 ... Adjustment bolt, P1, P2, P3 ... Measurement reference point

Claims (5)

An adjustment mechanism for adjusting the position and orientation of the electromagnet with a plurality of adjustment bolts;
Measurement reference points provided at a plurality of locations on the electromagnet,
A measurement device installed at any location in the building where the electromagnet is installed, and measuring the position of the measurement reference point;
An analyzer for calculating an adjustment amount of the plurality of adjustment bolts for adjusting the electromagnet to a regular position;
By measuring the position of the measurement reference point, the adjustment amount is calculated for each of the adjustment bolts, and the electromagnet is moved to a normal position by moving the adjustment bolts to the calculated adjustment amount. A method for aligning an electromagnet for a proton beam accelerator characterized by the following.   The adjustment amount is calculated for each adjustment bolt based on the position variation amount measured for each adjustment bolt by measuring the position variation amount of the measurement reference point when the adjustment bolt is moved by a predetermined amount. The alignment method of the electromagnet for proton beam accelerators of Claim 1 characterized by these. An adjustment mechanism that adjusts with a plurality of adjustment bolts that adjust the position and orientation of the electromagnet;
Measurement reference points provided at a plurality of locations on the electromagnet,
A measurement device installed at any location in the building where the electromagnet is installed, and measuring the position of the measurement reference point;
An electromagnet alignment system for a proton beam accelerator, comprising: an analyzing device that calculates an adjustment amount of the plurality of adjustment bolts for adjusting the electromagnet to a normal position.   4. The proton magnet accelerator electromagnet alignment system according to claim 3, wherein the adjustment mechanism adjusts the horizontal and vertical positions of the electromagnets by rotating a plurality of the adjustment bolts. 5. 5. The proton beam accelerator electromagnet alignment system according to claim 4, wherein the adjustment bolt includes an actuator that rotates the adjustment bolt, and the actuator is actuated by a command of the analysis device.

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