{"id":2523,"date":"2019-04-16T08:00:38","date_gmt":"2019-04-16T15:00:38","guid":{"rendered":"https:\/\/www.rbdinstruments.com\/blog\/?p=2523"},"modified":"2019-04-14T18:55:44","modified_gmt":"2019-04-15T01:55:44","slug":"20-610-3kv-adjustment","status":"publish","type":"post","link":"https:\/\/www.rbdinstruments.com\/blog\/20-610-3kv-adjustment\/","title":{"rendered":"20-610 3kV Adjustment"},"content":{"rendered":"

The 20-610 high voltage gun supply used on PHI 600 and 660 scanning Auger systems provides the beam voltage, filament current and emission voltage to the Lab6 filament in the cylindrical mirror analyzer.<\/p>\n

As part of the linearity adjustment process, the beam voltage is set to 3 keV so that the top of the elastic peak comes in at 3 keV.<\/p>\n

The 3 keV elastic peak adjustment potentiometer in the 20-610 is R108.\u00a0\u00a0 The process is simple:<\/p>\n

    \n
  1. Adjust the specimen stage Z axis for maximum counts and best shape of the peak during a 3 keV elastic peak alignment.<\/li>\n
  2. Adjust the analyzer control gain so that the AES peaks come in at the correct location in a survey. Typically clean copper is used since it has both low and high energy peaks.<\/li>\n
  3. Reacquire the elastic peak but do not move the specimen stage. If the elastic peak does not come it at 3 keV, move the elastic peak to 3 keV by adjusting R108 in the 20-610.<\/li>\n<\/ol>\n

    Sometimes there is not enough range of adjustment with the R108 potentiometer.\u00a0 For those cases, this blog post will explain how to modify the PCB 100 board in the 20-610 in order to extend the 3 kV adjustment range.<\/p>\n

    The schematic below shows the R108 potentiometer circuit.<\/p>\n

    \"R108

    The ends of R108 are connected to + and \u2013 12V via two 49.9 K ohm resistors, R107 and R109. Adjusting R108 adds a small offset current to IC 103, which in turn changes the 3 kV output of the 20-610.<\/p>\n

    If there is not enough range with R108 then we need to change the balance between the + and \u2013 12 volt supplies.\u00a0\u00a0 The way to do that is to remove R107 and replace it with a 100 k ohm trim potentiometer that is set to an initial value of 49.9 K ohms. 100 K ohm trim pots are available from any electronic component vendor (Digikey, Newark, Mouser….)<\/p>\n

    To prep the 100 K ohm trim potentiometer, the center wiper connection needs to be soldered to either end as shown below.<\/p>\n

    \"Bend

    With an ohmmeter, measure the resistance between the trim pot legs and adjust it for a resistance of 49.9 K ohms.<\/p>\n

    Turn off the 20-610 and on the back of the unit, unplug the main power cord, the remote program cable and the unscrew and remove the large HV cable connector. If there is a ground wire attached, remove it as well.<\/p>\n

    Place the 20-610 on a work bench and remove the 100 board. You will need to remove the board tie down bracket. Important! \u2013 Make sure that the 20-610 in unplugged when removing or installing the board tie down bracket as it is very close to some exposed wires that have voltage on them when the 20-610 is plugged in.<\/p>\n

     <\/p>\n

    \"R100

    \"remove

     <\/p>\n

     <\/p>\n

     <\/p>\n

    Unsolder R107 and install the new trim pot on the back side of the 100 board.\u00a0 \u00a0You will need to bend the two pins on the trim pot so that the adjustment screw faces up.<\/p>\n

    \"R107

    Reinstall the 100 board inside the 20-610.\u00a0 Make sure that it is seated all the way into the mother board connector. Reinstall the board tie down bracket. Do not put the cover back on the 20-610.<\/p>\n

    Install the 20-610 into the electronics rack and reconnect the large HV cable (be sure to screw it in all the way), and the HV programming cable.\u00a0 Make sure that the 20-610 main power switch is\u00a0 OFF and then plug in the main power cord into the interlocked power strip.<\/p>\n

    Slide the 20-610 out enough so that you can get to R108 and the new trim pot.\u00a0 Make sure that the 20-610 main power is OFF.<\/p>\n

    Remove the filament cap from the analyzer (3 screws) and connect a DVM and high voltage probe to either of the filament tabs.\u00a0 The ground reference on the high voltage probe should be connected to the vacuum chamber.<\/p>\n

    \"\"

     <\/p>\n

    ***Caution, high voltage is present! Refer adjustment to qualified personnel ***<\/strong><\/p>\n

    Turn on the 20-610 and using AugerMap and the normal turn on procedure, set the beam voltage to 3 kV.<\/p>\n

    ***Caution, high voltage is present! Refer adjustment to qualified personnel ***<\/strong><\/p>\n

    Center R108 and then adjust the new 100 K ohm trim pot so that the voltage on the filament cap is 3,000 volts.<\/p>\n

    Turn off the beam voltage in AugerMap and then turn off the 20-610.<\/p>\n

    Reconnect the filament cap to the analyzer.\u00a0 Press down on the cap as you tighten the 3 screws that hold the cap onto the top of the CMA filament adjustment housing.<\/p>\n

    Turn the 20-610 back on and turn the beam voltage on and set it to 3 kV.\u00a0 Bring up the filament current to the normal operating point (typically 1.3 amps)<\/p>\n

    Perform the AES calibration procedure and adjust R108 so that the elastic peak comes in at 3 keV.\u00a0\u00a0 When you are finished with the AES calibration, put the cover back on the 20-610 (front 2 cover screws only) and slide it back into the console.\u00a0 The AES calibration procedure is listed below \u2013<\/p>\n

    Auger energy calibration on 600 and 660 scanning Auger systems<\/strong><\/p>\n

    This procedure requires sliding the 20-610 high voltage supply out and removing the cover to gain access to the beam voltage offset potentiometer, R108. Turn off the 20-610 when sliding it in out or in, and when removing or installing the cover.<\/p>\n

    Procedure:<\/strong><\/p>\n

      \n
    1. Load a sample of pure copper.<\/li>\n
    2. If you are using AugerMap software, set the magnification to 10,000X and use the Area Scan mode to minimize sample topography effect on the Auger signal.<\/li>\n
    3. Perform an elastic peak alignment and adjust the Z axis sample position to obtain maximum counts and best peak shape.<\/li>\n
    4. Sputter the sample clean until no carbon or oxygen is present.<\/li>\n
    5. Re-acquire the elastic peak to ensure that the sample is at the optimum position: highest counts and best peak shape. When the elastic peak is differentiated, the positive and negative excursions should be equal and symmetrical.<\/li>\n
    6. From this point on, do not move the sample<\/strong>!<\/li>\n
    7. With the beam voltage at 3kV, acquire a survey from 30eV to 1030eV, using .5eV\/step, 50 ms\/point.<\/li>\n
    8. Differentiate the survey and check the peak positions against the correct values as listed in the PHI handbook or other reference. A typical value is 920eV for the high energy peak and 60eV for the low energy peak on copper.<\/li>\n
    9. Note:\u00a0<\/strong>If using AugerScan software, you can simply adjust the scale factor in the AES<\/li>\n
    10. Acquire an alignment with a range of 900 to 940, .5eV\/step, 15ms\/point and do the adjustment in real time. For copper, set the n\/e peak to approximately 917eV. When differentiated, the high energy Cu peak should be 920eV.<\/li>\n
    11. Acquire another survey and check that the differentiated peak positions are correct. Document the results for future reference and file it in the system calibration log.<\/li>\n
    12. Acquire another elastic peak,\u00a0but do not move the sample<\/strong>!<\/li>\n
    13. If the elastic peak is not centered at 3kV, then adjust R108 in the Bertan 20-610 High Voltage power supply to center the elastic peak.<\/li>\n<\/ol>\n

      Calibration is complete.<\/strong><\/p>\n

      From this point on, every-time you set the elastic peak, the sample will be at the focal point of the analyzer (maximum signal and best shaped peak), and all of the Auger peaks will be in the correct positions.<\/p>\n","protected":false},"excerpt":{"rendered":"

      The 20-610 high voltage gun supply used on PHI 600 and 660 scanning Auger systems provides the beam voltage, filament current and emission voltage to the Lab6 filament in the cylindrical mirror analyzer. As part of the linearity adjustment process, … Continue reading →<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":2516,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","footnotes":"","jetpack_publicize_message":"","jetpack_is_tweetstorm":false,"jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","enabled":false}}},"categories":[164,162],"tags":[275,276],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"https:\/\/i0.wp.com\/www.rbdinstruments.com\/blog\/wp-content\/uploads\/2019\/04\/20-610-Bertan.jpg?fit=1008%2C490&ssl=1","jetpack_shortlink":"https:\/\/wp.me\/p2DEXo-EH","jetpack_sharing_enabled":true,"jetpack_likes_enabled":true,"jetpack-related-posts":[{"id":1184,"url":"https:\/\/www.rbdinstruments.com\/blog\/xps-aes-peak-linearity-adjustments\/","url_meta":{"origin":2523,"position":0},"title":"XPS and AES peak linearity adjustments","author":"Randy","date":"July 21, 2014","format":false,"excerpt":"This post is a compilation of some calibration tech tips that I have written over the years. The procedures listed below explain how to calibrate the following systems and units: 5600 and 5400 XPS systems, Double pass CMA XPS analyzers Scanning Auger system, Auger analyzers WARNING: Some of these procedures\u2026","rel":"","context":"In "Operation and Calibration Procedures"","block_context":{"text":"Operation and Calibration Procedures","link":"https:\/\/www.rbdinstruments.com\/blog\/category\/operation-and-calibration-procedures\/"},"img":{"alt_text":"xps-copper-gold-peaks","src":"https:\/\/i0.wp.com\/www.rbdinstruments.com\/blog\/wp-content\/uploads\/2014\/07\/xps-copper-gold-peaks.jpg?fit=717%2C471&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.rbdinstruments.com\/blog\/wp-content\/uploads\/2014\/07\/xps-copper-gold-peaks.jpg?fit=717%2C471&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.rbdinstruments.com\/blog\/wp-content\/uploads\/2014\/07\/xps-copper-gold-peaks.jpg?fit=717%2C471&ssl=1&resize=700%2C400 2x"},"classes":[]},{"id":1597,"url":"https:\/\/www.rbdinstruments.com\/blog\/pm-sequence-on-xps-and-aes-systems\/","url_meta":{"origin":2523,"position":1},"title":"PM sequence on XPS and AES systems","author":"Randy","date":"December 6, 2015","format":false,"excerpt":"Performing regular Preventive Maintenance on surface analysis systems such as X-ray Photo Electron spectrometers (XPS) and Auger Electron spectrometers (AES) is a very important step in keeping the systems functioning properly and reliably. But performing the necessary steps in the correct PM sequence will make sure that you maximize the\u2026","rel":"","context":"In "Operation and Calibration Procedures"","block_context":{"text":"Operation and Calibration Procedures","link":"https:\/\/www.rbdinstruments.com\/blog\/category\/operation-and-calibration-procedures\/"},"img":{"alt_text":"electronics console air filters","src":"https:\/\/i0.wp.com\/www.rbdinstruments.com\/blog\/wp-content\/uploads\/2012\/11\/GMBH-filters.jpg?fit=704%2C470&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.rbdinstruments.com\/blog\/wp-content\/uploads\/2012\/11\/GMBH-filters.jpg?fit=704%2C470&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.rbdinstruments.com\/blog\/wp-content\/uploads\/2012\/11\/GMBH-filters.jpg?fit=704%2C470&ssl=1&resize=700%2C400 2x"},"classes":[]},{"id":1864,"url":"https:\/\/www.rbdinstruments.com\/blog\/20-327-beam-voltage-adjustment\/","url_meta":{"origin":2523,"position":2},"title":"20-327 Beam Voltage Adjustment","author":"Randy","date":"January 18, 2017","format":false,"excerpt":"This post is about how to adjust the 20- 327 2kV beam voltage for the elastic peak. Click on the link below to go to the .PDF 20-327 beam voltage adjustment The 20-327 electron gun control is used on the Physical Electronics 610 series scanning auger electron systems.\u00a0 The 20-327\u2026","rel":"","context":"In "Operation and Calibration Procedures"","block_context":{"text":"Operation and Calibration Procedures","link":"https:\/\/www.rbdinstruments.com\/blog\/category\/operation-and-calibration-procedures\/"},"img":{"alt_text":"20-327 front panel","src":"https:\/\/i0.wp.com\/www.rbdinstruments.com\/blog\/wp-content\/uploads\/2017\/01\/20-327-front-panel.jpg?fit=745%2C309&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.rbdinstruments.com\/blog\/wp-content\/uploads\/2017\/01\/20-327-front-panel.jpg?fit=745%2C309&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.rbdinstruments.com\/blog\/wp-content\/uploads\/2017\/01\/20-327-front-panel.jpg?fit=745%2C309&ssl=1&resize=700%2C400 2x"},"classes":[]},{"id":1031,"url":"https:\/\/www.rbdinstruments.com\/blog\/20-805-analyzer-control-calibrations\/","url_meta":{"origin":2523,"position":3},"title":"20-805 analyzer control calibrations","author":"Randy","date":"April 7, 2014","format":false,"excerpt":"This post explains some tests and calibrations for the 20-805 analyzer control which is used on older Physical Electronics (PHI) ESCA, XPS and AES surface analysis systems. The 20-805 analyzer control is typically used to control the 15-255G and 25-260 double pass cylindrical mirror analyzers. 20-805 Analog AES Input Test\u2026","rel":"","context":"In "Operation and Calibration Procedures"","block_context":{"text":"Operation and Calibration Procedures","link":"https:\/\/www.rbdinstruments.com\/blog\/category\/operation-and-calibration-procedures\/"},"img":{"alt_text":"analyzer-control-20805","src":"https:\/\/i0.wp.com\/www.rbdinstruments.com\/blog\/wp-content\/uploads\/2014\/04\/analyzer-control-20805.jpg?fit=493%2C227&ssl=1&resize=350%2C200","width":350,"height":200},"classes":[]},{"id":3106,"url":"https:\/\/www.rbdinstruments.com\/blog\/cmapp-new-features\/","url_meta":{"origin":2523,"position":4},"title":"CMapp New Features","author":"Randy","date":"January 26, 2021","format":false,"excerpt":"A list of new features in CMapp, the RBD Instruments' microCMA data acquisition and data massage software.","rel":"","context":"In "microCMA"","block_context":{"text":"microCMA","link":"https:\/\/www.rbdinstruments.com\/blog\/category\/microcma\/"},"img":{"alt_text":"estimate target current","src":"https:\/\/i0.wp.com\/www.rbdinstruments.com\/blog\/wp-content\/uploads\/2021\/01\/target-current-9103-or-estimate.jpg?fit=364%2C566&ssl=1&resize=350%2C200","width":350,"height":200},"classes":[]},{"id":345,"url":"https:\/\/www.rbdinstruments.com\/blog\/ion-beam-induced-low-energy-electrons\/","url_meta":{"origin":2523,"position":5},"title":"Ion Beam Induced Low Energy Electrons","author":"Randy","date":"February 6, 2013","format":false,"excerpt":"For the purpose of checking the performance of a surface analysis spectrometer such as a cylindrical mirror analyzer (CMA) or spherical capacitive analyzer (SCA), looking at an ion induced low energy electron peak can be extremely helpful. The peak typically occurs at about 20 to 50 eV and the size\u2026","rel":"","context":"In "Operation and Calibration Procedures"","block_context":{"text":"Operation and Calibration Procedures","link":"https:\/\/www.rbdinstruments.com\/blog\/category\/operation-and-calibration-procedures\/"},"img":{"alt_text":"ion gun noise","src":"https:\/\/i0.wp.com\/www.rbdinstruments.com\/blog\/wp-content\/uploads\/2013\/02\/Ion-gun-noise.png?resize=350%2C200&ssl=1","width":350,"height":200},"classes":[]}],"_links":{"self":[{"href":"https:\/\/www.rbdinstruments.com\/blog\/wp-json\/wp\/v2\/posts\/2523"}],"collection":[{"href":"https:\/\/www.rbdinstruments.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.rbdinstruments.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.rbdinstruments.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.rbdinstruments.com\/blog\/wp-json\/wp\/v2\/comments?post=2523"}],"version-history":[{"count":2,"href":"https:\/\/www.rbdinstruments.com\/blog\/wp-json\/wp\/v2\/posts\/2523\/revisions"}],"predecessor-version":[{"id":2526,"href":"https:\/\/www.rbdinstruments.com\/blog\/wp-json\/wp\/v2\/posts\/2523\/revisions\/2526"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.rbdinstruments.com\/blog\/wp-json\/wp\/v2\/media\/2516"}],"wp:attachment":[{"href":"https:\/\/www.rbdinstruments.com\/blog\/wp-json\/wp\/v2\/media?parent=2523"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.rbdinstruments.com\/blog\/wp-json\/wp\/v2\/categories?post=2523"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.rbdinstruments.com\/blog\/wp-json\/wp\/v2\/tags?post=2523"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}