1 / 14

Mark Vagins Kavli IPMU, University of Tokyo

Gd Status. Mark Vagins Kavli IPMU, University of Tokyo. 4 th Open Meeting for the Hyper-Kamiokande Project Kashiwa January 28, 2014. Super-Kamiokande. Super-K Water system. EGADS Hall (2500 m^ 3). ５０ｍ.

rgilbert
Download Presentation

Mark Vagins Kavli IPMU, University of Tokyo

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Gd Status Mark Vagins Kavli IPMU, University of Tokyo 4th Open Meeting for the Hyper-Kamiokande Project Kashiwa January 28, 2014

  2. Super-Kamiokande Super-K Water system EGADS Hall (2500 m^3) ５０ｍ In order to make sure that the GADZOOKS! idea (Gd enrichment)will work in Super-Kamiokande, we have built a dedicated gadolinium test facility in the Kamioka mine. This 200 ton-scale R&D project is called EGADS – Evaluating Gadolinium’s Action on Detector Systems.

  3. EGADS – Evaluating Gadolinium’s Action on Detector Systems n EGADS Facility ne p p g Gd Beacom and Vagins, Phys. Rev. Lett., 93:171101, 2004 g e+ ;. Adding water soluble gadolinium to Hyper-K would greatly enhance its ability to detect antineutrinos. EGADS is a dedicated gadolinium demonstrator project which includes a working 200 ton scale model of Super-K. 12/2009 11/2011 8/2013 9/2013 Within this year, EGADS will have shown conclusively whether or not gadolinium loading of Super-K/Hyper-K will be safe and effective. If so, this is the likely future of all light water Cherenkov detectors.

  4. Gd loading of the 200-ton tank • Feb. 6th, 2013: Inject first 30 kg of Gd2(SO4)3*8H2O • Feb. 13th: Inject another 30 kg (60 kg total) • March 6th: Inject 29.4 kg (89.4 kg total) • March 20th/21st: Inject 60 kg (149.4 kg total) • April 1st/2nd: Inject 124.6 kg (274 kg total) April 16th20th: Inject 126 kg (400 kg total) World record: Largest single quantity of gadolinium in solution!

  5. Percentage of Cherenkov light remaining after 15 meters of travel SK-III and SK-IV Ultrapure Water = 74.7% - 82.1% @ 15 m 60 kg of Gd2(SO4)3*8H2O 52% n capture on Gd 89.4 kg of Gd2(SO4)3*8H2O 62% on Gd 149.4 kg of Gd2(SO4)3*8H2O 73% on Gd 274 kg of Gd2(SO4)3*8H2O 83% on Gd 400 kg of Gd2(SO4)3*8H2O 88% on Gd 30 kg of Gd2(SO4)3*8H2O 35% n capture on Gd Monte Carlo studies using these water transparency data are under way within the physics analysis groups of Super-K

  6. We then drained the tank to prepare for PMT installation. Looking down into the EGADS tank after four months of gadolinium exposure. No rust!

  7. An EGADS timeline: 2009 2010 2011 2012 2013 2014 2015 2016 2017 R&D Project Approved Hall E Excavation Build 200-ton Tank Install Water Systems 15-/200-t Pure Water Runs 15-ton Tank Gd Runs 200-ton Tank Pure Water Run w/o PMTs 200-ton Tank Gd Run w/o PMTs 200-ton Tank PMT Installation 200-ton Tank Pure Water Data-taking Run Since the last Hyper-K Open Meeting we have completed construction of the EGADS neutrino detector, which includes 13 Hyper-K prototype PMTs. [see Nishimura-san’s talk]

  8. EGADS PMT installation; August 2013

  9. Working Inside the EGADS Tank; August 2013

  10. Looking Down Into the Completed EGADS Detector; August 2013 Insert: Event Display of a Downward-Going Cosmic Ray Muon

  11. Percentage of Cherenkov light remaining after 15 meters of travel SK-III and SK-IV Ultrapure Water = 74.7% - 82.1% @ 15 m By turning on and off various components of the EGADS water system we can see that the newly-installed detector materials are still being conditioned by the ultrapure water. Additional water system components are being installed this weekend to speed up conditioning. Target date for injecting Gd = March 1st , 2014 Pure water in 200-ton EGADS detector.

  12. An EGADS timeline: 2009 2010 2011 2012 2013 2014 2015 2016 2017 R&D Project Approved Hall E Excavation Build 200-ton Tank Install Water Systems 15-/200-t Pure Water Runs 15-ton Tank Gd Runs 200-ton Tank Pure Water Run w/o PMTs 200-ton Tank Gd Run w/o PMTs 200-ton Tank PMT Installation 200-ton Tank Pure Water Data-taking Run 200-ton Tank Gd Data-taking Run ATM  QBEE Electronics Upgrade Full Galaxy Supernova Sensitivity Fully Automated Instant Supernova Alert Capability

  13. = ~1,100,000,000 JPY This exact, bid-ready price is for one HK cavern’sgadolinium-related equipment. It is based on SCW’s experiencegained from building and operating EGADS. Adding gadolinium-related water system equipment for the full detector (i.e., both caverns) will therefore add about 2,200,000,000 JPY (2-3%)to the total project costif SCW’s pricing prevails.

  14. In conclusion: the key Gd/water-related developments • After good Gd results without phototubes, the EGADSphototubes (and 13 HK tubes) have been installed and the DAQ put together. Now EGADS is a fully functional detector running with pure, SK-like water. • After the new detector elements finish “soaking in” we will addgadolinium to the detector. Target date = March 1st , 2014 • A formal decision on adding Gd2(SO4)3 to SK is expected to be made later this year after results from the Gd-loaded EGADS detector are acquired and studied by the Collaboration’s physics analysis groups. • Assuming Super-K decides to move forward, the actual timing of SK’s Gd upgrade will have to be negotiated and agreed upon by all interested parties. • Meanwhile, based upon what has been learned in Hall E, other Gd-loaded WC detectors (WATCHMAN, ANNIE, etc) are now being seriously pursued in the US.

More Related