= Wide Angle Baffle Cooling Test 2018 = ||<>||<>||<>||<>|| == Important note about data == * [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=4612|Cryocon's misread]] == Coil Injection Time == * [[LCGT/subgroup/AOS/WideAngleBuffle/CoilInjectionTime|Coil Injection Time]] == Links to knowledge == * [[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=8500|The drawings]] * [[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=6474|Wide Angle Baffle design review (Obuchi)]] * [[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=7415|Requirements for heat links of WAB (Akutsu)]] * [[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=7710|Temporal information links]] * [[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=7588|Wide Angle Baffle assembly-procedure manual (Zeidler)]] * [[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=4660|Calculations regarding the back-scattering of different Wide Angle Baffle designs (Zeidler)]] * [[https://nbviewer.jupyter.org/urls/dl.dropbox.com/s/niycmhy8178ed0y/WAB20170224.ipynb|Personal calc of WAB's stray light noise by Akutsu]]; due to several uncertain parameters there are several results and no one would know the actual effect! * Heat links positions (by Obuchi) [[attachment:fmkopgehpapgdkcc.png]] == Task list == {{{#!wiki green/solid Note: some of the tasks can be done in parallel. }}} * --(Place/install the WAB suspension.)-- * --(Measure several relative dimensions to get useful information for the future commissioning; concretely speaking:)-- * What....? * --(Test the '''''saving mode''''' of the WAB suspension.)-- * --(Don't forget to replace the damping magnets to SmCo ones. )-- * What is the requirement to say the damping is sufficient...? * --(Connect electric cables (with checking) in the IYC chamber.)-- * --(3 photosensors; in each photosensor head, two PDs should be connected parallel. '''''Need to calibrate the response of each sensor head...''''')-- * --(2 heaters; should be connected parallel??)-- * --(1 coil for actuation.)-- * --(6 thermometers with (extended?) patch cables made of phospher bronze; the extended double twisted pare cables will be delivered on '''''Jan 26''''')-- * --(Connect 4 heat links.)-- * --(Check oplev signals.)-- * --(Connect cables the outside as well.)-- * --(Make a realtime model to monitor.)-- * --(Take interface with Tcam.)-- * --(Make a plan to do leak check before cooling down.)-- * --(Don't forget to add some heat links (Cu?) to the top of the suspension...)-- * --(Remove the Heat-Link block)-- == Photosensor == The PDs and LED are aligned as shown in the below picture. {{attachment:PS_backside.png|Photosensor head|width="200" }} {{attachment:IMG_4151.jpg|PD and LED pin assign|width="250"}} The following LEDs and PDs are used; thanks for the information from Fukunaga-kun and Ushiba-kun. * [[https://www.thorlabs.co.jp/thorproduct.cfm?partnumber=LED1200E|LED: Thorlabs LED1200E]] * [[https://www.thorlabs.co.jp/thorproduct.cfm?partnumber=FGA21|PD: Thorlabs FGA21]] OSEM satellite amp is used to drive. * [[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=3499]] == Pin Assign == * Summary of the pin assign of burndy connector inside the cryostat. NOTE: The meaning of color for thermometer cable is <
> RED = I- , YELLOW = I+ , GREEN = V- , BLACK = V+ P22 ||Pin Name||Resistance|| Equipment || Assign || Comment1 || Comment2 || Connection || ||A||75 ohm|| Thermometer || V- || Green || Cryocon CH A || ○ || ||B||75 ohm|| Thermometer || V+ || Black || || ○ || ||C||4 ohm|| Thermometer || I- || Red || || ○ || ||D||4 ohm|| Thermometer || I+ || Yellow || || ○ || ||E||75 ohm|| Thermometer || V- || Green || Cryocon CH B || ○ || ||F||75 ohm|| Thermometer || V+ || Black || || ○ || ||G||4 ohm|| Thermometer || I- || Red || || ○ || ||H||4 ohm|| Thermometer || I+ || Yellow || || ○ || ||J||75 ohm|| Thermometer || V- || Green || Cryocon CH C || ○ || ||K||75 ohm|| Thermometer || V+ || Black || || ○ || ||L||4 ohm|| Thermometer || I- || Red || || ○ || ||M||4 ohm|| Thermometer || I+ || Yellow || || ○ || ||N||Blank|| || || || || || ||P||75 ohm|| Thermometer || V- || Green || Cryocon CH D || ○ || ||R||75 ohm|| Thermometer || V+ || Black || || ○ || ||S||4 ohm|| Thermometer || I- || Red || || ○ || ||T||4 ohm|| Thermometer || I+ || Yellow || || ○ || ||U||75 ohm|| Thermometer || V- || Green || Cryocon CH E || ○ || ||V||75 ohm|| Thermometer || V+ || Black || || ○ || ||W||4 ohm|| Thermometer || I- || Red || || ○ || ||X||4 ohm|| Thermometer || I+ || Yellow || || ○ || ||Y||Blank|| || || || ||　|| P23 ||Pin Name||Resistance|| Equipment || Assign || Comment1 || Comment2 || Connection || ||A||75 ohm|| Thermometer || V- || Green || Cryocon CH F || ○ || ||B||75 ohm|| Thermometer || V+ || Black || || ○ || ||C||4 ohm|| Coil Mag. Act. || I- || || ''As low resistor line was needed.'' || ○ || ||D||4 ohm|| Coil Mag. Act. || I+ || || ''As low resistor line was needed.'' || ○ || ||E||75 ohm|| PS1 PD || V- (K)|| || || ○ || ||F||75 ohm|| PS1 PD || V+ (A)|| || || ○ || ||G||4 ohm|| PS1 LED || I- (K)|| || || ○ || ||H||4 ohm|| PS1 LED || I+ (A)|| || || ○ || ||J||75 ohm|| PS2 PD || V- (K)|| || || ○ || ||K||75 ohm|| PS2 PD || V+ (A)|| || || ○ || ||L||4 ohm|| PS2 LED || I- (K)|| || || ○ || ||M||4 ohm|| PS2 LED || I+ (A)|| || || ○ || ||N||Blank|| || || || || || ||P||75 ohm|| PS3 PD || V- (K)|| || || ○ || ||R||75 ohm|| PS3 PD || V+ (A)|| || || ○ || ||S||4 ohm|| PS3 LED || I- (K)|| || || ○ || ||T||4 ohm|| PS3 LED || I+ (A)|| || || ○ || ||U||75 ohm|| Thermometer || I- || Red|| Cryocon CH F || ○ || ||V||75 ohm|| Thermometer || I+ || Yellow || Cryocon CH F || ○ || ||W||4 ohm|| Heater || I- || || || ○ || ||X||4 ohm|| Heater || I+ || || || ○ || ||Y||Blank|| || || || || || {{attachment:burndy_cryostat.png | Diagram|width="300" }} === DAQ === ==== ==== Real-time computer: k1??? ||'''Slot'''|| '''Item'''|| '''Assigned to''' || '''S/N''' || ||42||''''|| || || ||41||''''|| || || ||40||''''|| || || ||39||''''|| || || ||38||''''|| || || ||37||''''|| || || ||36||''''|| || || ||35||''''|| || || ||34||''''|| || || ||33||''''|| || || ||32||''''|| || || ||31||''''|| || || ||30||''''|| || || ||29||''''|| || || ||28||''''|| || || ||27||''''|| || || ||26||''''|| || || ||25||''''|| || || ||24||''''|| || || ||23||''''|| || || ||22||''''|| || || ||21||''''|| || || ||20||''''|| || || ||19||''''|| || || ||18||''''|| || || ||17||''''|| || || ||16||''''|| || || ||15||''''|| || || ||14||''''|| || || ||13||''''|| || || ||12|| AI Chassis || DAC0 || SN??? || ||11|| AA Chassis || ADC0 || SN??? || ||10||''''|| || || || 9||<|4>I/O Chassis||<|4> ||<|4> SN??? || || 8||''''|| || || || 7||''''|| || || || 6||''''|| || || || 5||''''|| || || || 4||''''|| || || || 3||''''|| || || || 2||''''|| || || || 1||''''|| || || || 0||''''|| || || == OpLev == * Optical lever installed at the +X/-Y side of the IYC * Path-length inside the chamber (viewport to viewport): ~3000 mm {{attachment:ETMchamber_WAB_oplev_beams3.PNG| Diagram|width="500"}} == WAB Alignment == * Alignment done with 2 laser-leveler inside the IYC * Regarding the used terms: * As the baffle is placed along the Y-arm, +Y and -Y refer to both long ends of the baffle toward the Y-end and toward the center area, respectively! * The same holds true for the horizontal dimension in x-arm direction (+X means toward X-end and -X toward center/PSL) === Yaw === * laser-leveler needs to be close to the -Y main-beam entrance in a height 300 - 400 mm above the optical table * Vertical laser line to be adjusted to the main-beam indication on the optical table and the inner wall of the cryostat * Checked the line by using the slids of the flanges on top the WAB (each slid is ~3.5 mm broad) * For both slids, the laser line is mismatched (not centered) toward -X by ~0.5 mm (@ +Y slid) and ~1 mm (@ -Y slid) That means that there is probably also a -X offset! * The flanges have a distance of 170 mm which indicates a maximum yaw-tilting of ~0.1 degrees '''Note:''' taking the distances is very hard as the position of the slids is not easy to access === Pitch === * laser-leveler outside the cryostat (but inside IYC) set to give a horizontal line along length side of the baffle * Found a slight mismatch for the outer screw holding the OpLev mirrors in +Y,+X and -Y,+X * Difference is ~1 mm (+Z @ -Y, so -Y-side is higher than +Y-side) * With approx. 500 mm distance between both screws, the maximum pitch is ~0.1 degrees === Roll === * Took the height of the OpLev mirror screw-holes (@ -Y,+X and -Y,-X) with a vertical ruler and the horizontal line of the laser-leveler outside the cryostat * Measured a difference of 2.5 mm which makes it a roll of 0.55 degrees (radius of baffle ~130 mm); -Y,-X is higher! * Then took the height of baffle-wings which are mounted on the flanges and could not measure any difference (within an error of 0.5 mm) * Hence, only the baffle is slightly rolled within the flanges!