Quantum Opus Opus One, Installation And Operation Manual

Page 1: ...Opus One TM Superconducting Nanowire Single Photon Detection System Installation and Operation Manual March 28 2020 Quantum Opus LLC 22241 Roethel Drive Suite A Novi MI 48375 USA 1 269 248 1004 ...

Page 2: ...Installation 9 2 3 Opus One Unit Installation 9 3 Electronics Unit Installation 12 3 1 Connecting the electronics to the Opus One 12 4 System Operation 14 4 1 Cool Down Procedure 14 4 2 Warm Up Procedure 16 5 Detector Operation 17 5 1 Setting Up the Detectors 17 5 2 Web Interface Example 18 6 Troubleshooting 20 2 ...

Page 3: ...ucts Contact Information Quantum Opus LLC 22241 Roethel Dr Ste A Novi MI 49375 Telephone 1 269 248 1004 Email info quantumopus com Website http www quantumopus com Document Information This document is provided by the copyright holders as is and any express or implied war ranties including but not limited to the implied warranties of merchantability and fitness for a particular purpose are disclai...

Page 4: ...ut proper performance of the procedure or practice contact Quantum Opus support for guidance B NOTE A NOTE notice identifies a procedure practice or similar that if not properly performed or adhered to could result in degraded system performance reduced system up time or increased frequency of system maintenance Although adherence to a NOTE is not safety critical adherence is required to ensure sy...

Page 5: ...unit containing four superconducting nanowires cryogenic vacuum system and fiber optic couplers Various configurations are available with up to 32 detector channels in the above 19 inch rack configuration 3U height Specific options and configurations may vary 5 ...

Page 6: ...mometer Cable DB9 M F Light in Fiber Power USB 2 0 1 n 2 Pulse out SMA 1 2 n 1 2 n Cold head drive cable Compressor Unit Opus One Unit Electronics Unit QOELEC Figure 2 Nanowire system schematic showing Opus One head unit electronics unit and com pressor with all connections 1 1 Overview The nanowire system has three main physical components as identified in Figure 2 1 The Electronics Unit that pro...

Page 7: ...Opus One 3 The Compressor Unit that provides the high pressure high purity helium and valve con trol signals to obtain and maintain the low temperatures required for superconducting nanowire operation 7 ...

Page 8: ...ion Ensure the lines do not rub on sharp corners or on other objects that may become damaged from abrasion with the metal tubing such as electrical wiring or water lines B 1 Determine compressor and high pressure helium location appropriate for proper proximity to your water and power connections NOTE Because of the polarization sensitivity of the nanowire devices it is important to minimize uncon...

Page 9: ...ll manufacturer recommendations and local laws codes and building recommendations 2 Perform any recommended compressor run testing See provided compressor manufacturer documentation 3 After any required compressor run testing install the high pressure helium lines onto the compressor SUPPLY and RETURN connections as described in the compressor manufac turer documentation 2 3 Opus One Unit Installa...

Page 10: ...nnected it can be positioned into its final installed location with minimal strain on the high pressure helium connections at the rear of the unit 7 The pressurized helium lines must be connected in the following order a Ensure the SUPPLY and RETURN lines are already connected to the compressor and properly labeled SUPPLY and RETURN b If optional pressurized right angle adapters are to be used con...

Page 11: ...Opus One Figure 3 Rear view of the Opus One detector unit showing a suggested lift point for installation 11 ...

Page 12: ...s One unit and the QOELEC to reduce the possibility of increased electrically induced noise counts i 3 1 Connecting the electronics to the Opus One 1 With the QOELEC powered OFF connect the Opus One to the QOELEC using the provided double shielded SMA cables For each detector connect one cable from the Nanowire port on a QOELEC channel to the corresponding Electrical SMA connector on the Opus One ...

Page 13: ...ck views of 16 channel electronics module Figure 4 A typical 16 channel Quantum Opus SNSPD Control and Readout Electronics QOELEC module Configuration may vary by system 5 Plug in the provided power supply to the back of the QOELEC and turn the power on The power indicator light near the power switch will turn on The light will be orange if no valid USB connection is made to the unit and green if ...

Page 14: ... and repeated any time that the system has been allowed to warm to a point at which both stages are above 50 Kelvin for example in case of accidental power failure cooling water loss or intentional system shutdown NOTE The system should be in its warm state before starting this procedure to ensure proper cool down A fully warm state is defined as both thermometers Stage 1 and Stage 2 read above 28...

Page 15: ...he pump on until the system has reached 50 K 2 Ensure the compressor is ready for use including turning on any required cooling water or electrical breakers 3 Turn on the electrical power to the compressor The hum of the compressor and the 1 cycle per second hiss of the Opus One unit should begin immediately If the 1 cycle per second sound from the Opus One is not heard turn off the compressor and...

Page 16: ... to Section 5 1 4 2 Warm Up Procedure WARNING Ensure the system has been turned off for a minimum of 12 hours before opening the vent valve or making changes to any of the high pressure helium line connections Unsafe conditions can be created if the system is vented or the helium lines are disconnected from the compressor or Opus One unit while either internal temperature is much below room temper...

Page 17: ... steps to bias and operate each device 1 Using a 50 Ω impedance low noise cable connect the QOELEC channel Pulse Out SMA connector to a pulse counter with a 50 Ω input impedance For the standard option system no cryogenic amplifier set the counter to trigger on rising edge pulses with a threshold of 75 mV For negative pulses cryogenic amplifier option set the threshold to falling edge pulses with ...

Page 18: ...hanged e g dead time jitter pulse amplitude i 5 2 Web Interface Example Figure 5 Sample web interface discussed below The QOELEC is controlled using a computer interface A sample web based interface with associated Python HTML and JavaScript code may be provided upon request The following list of basic operations may be performed using this interface Channel ON OFF Each channel has a corresponding...

Page 19: ...ly decrease the bias Save Bias When all channels are turned on with their respective biases at the same time press the Save button This will store all of the biases to their respective channels Load Bias Press the Load button to load previously stored biases from using the Save button Keyboard Operation The above functions may be activated by keyboard if available Right and left arrow keys move be...

Page 20: ...rench If this connection is slightly loose the noise can be significantly worse 4 Remove any switching power supplies from the ac circuit that powers the Opus One system and electronics Major culprits are small cheaply made power supplies that run LED light strips mobile phone chargers and laptops 5 Disconnect the USB cable from the back of the QOELEC while monitoring the noise If the noise drops ...