Dr.X Works BHW-L User manual
Contents
1 Introduction 4
2 Installation 5
2.1 Unpacking and inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.2 Connections and controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.3 Interlocks ..................................... 6
2.4 Powerrequirements................................ 6
3 Operation 7
3.1 Circularmode................................... 7
3.2 Calibrationprocedure .............................. 7
3.3 Setting trip level interlocks . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3.4 Powerondelay .................................. 7
4 Technical specification 9
4.1 Electrical ..................................... 9
4.2 Mechanical .................................... 9
5 Environmental 10
6 Maintenance 11
7 Safety 12
8 Warranty 13
9 Mechanical outline 14
Wobbler System version 1.1 3
1. Introduction
This document details the design of the Wobbler system. The wobbler system is de-
signed to deflect a proton beam of a 30 MeV cyclotron in circular and random motion.
Wobbler System version 1.1 4
2. Installation
2.1 Unpacking and inspection
1. After installation of both the signal generator and the amplifier into 19”-rack or
other, connect both mains cables.
2. Connect the output of the signal generator (3p XLR) to the input of the power
amplifier.
3. Connect the output of the power amplifier to the HiP input of the signal generator.
4. Connect te HiP output of the signal generator to the deflecting coils.
5. Set CH1 and CH2 attenuators to 0dB (fully clockwise)
6. Set circuit ground switch to ”GROUNDED”
7. Set HPF (high pass filter) to ”OFF”
8. Set MODE to ¡DUAL¿
2.2 Connections and controls
In the table below the input and output connectors on the front and back panel are sum-
marized:
Front panel:
Mon-Ux Output BNC HiZ Output signal X-axis
Mon-Uy Output BNC HiZ Output signal Y-axis
I-coil X Output BNC 1 kΩ Current monitor 2V/A
I-coil Y Output BNC 1 kΩ Current monitor 2V/A
Back panel:
X and Y out Output Neutrik M. XLR 3 pole XLR
HiP-in Input Neutrik Speakon 2 pole connector
HiP-out Output Neutrik Speakon 4 pole connector
Mains power Input Euro connector 110 or 230 V (auto switching)
Wobbler System version 1.1 5
2.3. Interlocks
2.3 Interlocks
Both input and output interlocks are available on the 9 pole D connector on the rear of the
signal generator. The wobble-system-okay-output is an optically isolated contact between
pin 1 & 6 of the D connector. (Vmax = 300V, Imax = 130mA) the higher potential should
be on pin1. The enable-wobbler-input available between pin 5 and pin 9. Both pins need to
be short-circuited to enable the generator. The power amplifier is equipped with a remote
standby connector. Close a potential free switch on the “power remote” input to enable
standby mode.
2.4 Power requirements
The current source operates on single phase AC mains power from 100 V to 220V with a
frequency between 50 and 60 Hz without any need for range selection. The primary fuses
are 1.6AT for 220V and 3.15AT for 120V
Wobbler System version 1.1 6
3. Operation
3.1 Circular mode
This mode can be selected using the switch on the front panel. Only the amplitude is user
adjustable. The frequency is set with dip-switches inside the enclosure. The deflection rd
can be calculated using this formula:
re= 1650 1−
f
100B0A
Ep
(3.1)
where:
re= radius of deflection in circular mode [mm]
f= frequency [Hz]
A= distance form magnet to target [m]
Ep= energy protons [MeV]
B0= magnetic field [T]
3.2 Calibration procedure
Calibration is done by DrX Works B.V.
3.3 Setting trip level interlocks
If the output current is lower than a pre-defined level it will trip the wobble-system-okay-
output. This trip level can be set in the following manner:
1. Adjust the current setting on the front panel (using a volt meter on the current
output (BNC) to the required trip level. Note: the reading is RMS.
2. Adjust the PX & PY potmeters inside (Fig.3.1) the signal generator until the match-
ing minimum-LED starts flashing.
3.4 Power on delay
Power on delay is set to 0- 0.75 - 1.05 and 1.49 seconds to reduce the inrush current while
switching on the wobbler rack.
Wobbler System version 1.1 7
3.4. Power on delay
Figure 3.1: board layout
Wobbler System version 1.1 8
4. Technical specification
4.1 Electrical
Frequency Frequency is currently set to 20Hz
Frequency range 10. . . 100Hz
Output current (power amp) Max 5Arms
Output voltage (BNC) 1V
Current monitor BNC connector, 2V/A
Fuse signal generator 1.6AT (220V) or 3.15 AT(120V)
Power supply amplifier 120V/60Hz
Power supply signal generator 110-220V/50..60Hz
4.2 Mechanical
Signal generator
Dimensions (LHW) 19” x 2U x 500mm
Weight ca. 3.2 kg (7 lbs)
Amplifier
Dimensions (LHW) 19” x 2U x 421mm
Weight ca. 12,6 kg (27,8lbs)
Wobbler System version 1.1 9
5. Environmental
Operating temperature range 0 to 40◦C ambient, however temperature fluctuations should
be kept as small as possible to prevent drifting. The Wobbler Systemshould be operated in
a clean environment. On no account must the Wobbler Systembe exposed to water ingress.
Wobbler System version 1.1 10
6. Maintenance
No maintenance is required in normal operation and there are no user-serviceable parts
within the Wobbler System. Each product is factory tested and supplied with a set of test
results. If degradation in performance to below the specified levels occurs, or a failure is
suspected, then the complete unit should be returned to the manufacturer together with
details of the fault.
Wobbler System version 1.1 11
7. Safety
Hazardous voltages are present within this line-operated unit. Do not remove any panels.
The Wobbler System must be grounded. Line supply is filtered within the amplifier. A
replaceable fuse is fitted to the line input connector which should be changed only when
the AC power is disconnected from the connector.
Wobbler System version 1.1 12
8. Warranty
Dr.X Works B.V. warrants for 2 years from date of shipment that the goods supplied will be
in full compliance with the agreed specifications and will be free from defects in material and
workmanship. Any and all other warranties (except of title) express or implied, relating to
fitness for particular purpose, merchantable quality or otherwise are expressly disclaimed.
Seller will not be responsible for special or consequential loss or damages. Liability shall
be limited to the repair or replacement of defective products subject to the return of the
product intact, and un-tampered with by the buyer.
Wobbler System version 1.1 13
9. Mechanical outline
Front panel
Wobbler System version 1.1 14
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