New MC mirror

New MC mirror

New MC mirror M.Punturo New MC mirror? Scattering in the end mirror of the IMC is the first cause of the ISYS upgrade Poor quality of the substrate has been the diagnosis The REOSC company selected by D.Enard and Lyon to perform the polishing of the new MC mirror failed and abandoned the polishing Both offers from WP and REOSC are on a best effort basis, meaning the requirements are considered as objectives. This was already the case

for the past orders for the existing core optics but a quality reasonably close to our requirements was finally obtained. In a similar way, Reosc accepted our requirements as objectives while committing on slightly degraded requirements. We MUST CONFIDE in the properties of the Faraday Isolator to avoid the fringes that hindered the ITF locking What to do? Small mirror: Current mirror

8 cm diam, 3 cm thick Back face crowded Only 360g with all the components Mirror unbalanced by the components Pendulum elastic constant determined by the coil wires instead of the suspension wires (125 m Cu-Be wires) Problems in controls, handling and radiation pressure (?)

Small IMC mirror? Two blanks are available with the usual MC size They should be retired from REOSC and sent to GSLumonics A 6 month polishing time is foreseen If we are lucky we will have a low scattering mirror with all the control and noise problems we have now Can we do better? Large substrates 6 Large Herasil end substrates are available in Lyon 350mm diameter, 100 mm thick Unusable for Virgo+, because of the low Q of Herasil (Tama)

Could we polish one with the IMC requirements? (GSLumonics) Changes New Marionetta Maybe we loose the translation degree of freedom New reference mass Retuning of the suspension Retuning of the controls More standard situation

Recently Viewed Presentations

  • Presentation to CRH Board, 2015 Management and Control

    Presentation to CRH Board, 2015 Management and Control

    HSE identified serious concerns which were communicated to the company but ignored. The Director (Mr Islam) was sentenced to 10 months in prison, suspended for two years and was ordered to pay £9,000 in costs for breaches to the H&S...
  • IB Maths SL Preparing for Examinations Teaching and

    IB Maths SL Preparing for Examinations Teaching and

    10. Exam questions are often written in a way so that, even if you cannot get the answer to one part, you can still answer later parts. This is especially true for Section B (extended-response questions). 11. Be completely familiar...
  • Insert Book Title Here - Houston Community College

    Insert Book Title Here - Houston Community College

    Chapter 5 Biological Roots of Criminal Behavior Frank Schmalleger PowerPoint presentation created by Ellen G. Cohn, Ph.D.
  • Higher Education Academy Senior Fellowship Application Alan ...

    Higher Education Academy Senior Fellowship Application Alan ...

    Student satisfaction up (in particular positivity about assessment feedback) and employability up. C. Students Feedback 'My advocacy skills have improved, my confidence has improved a lot with public speaking as well as my analytical and research skills' ...
  • Labour Market Information (LMI) What does it tell

    Labour Market Information (LMI) What does it tell

    Average distance travelled to work in Bradford - 7.9 miles (national average 9.3 miles) (source: 2011 Census) % of people who live in Bradford but work outside the district - 30% (source: 2011 Census) ... Joanne Sykes ...
  • Page 1

    Page 1

    Everyone agrees Mary is the Mother of Jesus Catholic Position: Theotokos- Mary is the God Bearer- Council of Ephesus- present day Turkey ( Asia Minor) Ascending Christology- emphasizes the humanity of Jesus Descending Christology- emphasize the divinity of Jesus Jesus:...
  • Renal Revending Project Reverse vending - our journey

    Renal Revending Project Reverse vending - our journey

    Meets TEEP [Technically, Environmentally & Economically Practicable] Regulations. Reduces costs and emissions. Less portering time. Reduces recycling costs - MDR or commodity resale. Transport miles and fuel costs down, carbon footprint down.
  • Technology Transfer, Knowledge Transfer or Knowledge Exchange ...

    Technology Transfer, Knowledge Transfer or Knowledge Exchange ...

    Contact Gaynor Richards Higher and Further Education Development Manager Department for Culture, Media and Sport Based at: Manchester Metropolitan University Regional Office, Ormond Building All Saints, Oxford Road Manchester, M15 6BX Tel: 0161 247 4625 Fax: 0161 247 2209 Email:...