JINR Jubilee 2014 Igor Golutvin had an 80

JINR Jubilee - 2014 Igor Golutvin had an 80 th birthday Jubillee at JINR in 2014. Now it is time for the 85 th.

CMS – US and RDMS The US and RDMS are the 2 largest groups in CMS and collaborated closely

US and RDMS - HCAL RDMS groups assumed many responsibilities in the HCAL project. Basically, they took full and complete responsibility for the mechanics and optics of the endcaps (HE) and for the mechanics of the forward calorimetry (HF). Igor Golutvin (JINR) was the leader of the RDMS project with Anatoli Zarubin as the deputy project leader.

RDMS is not just HE/HF Igor managed the full RDMS contributions to CMS from detectors to operations and then physics analysis.

RDMS and HCAL Specific to the HCAL fraction of the RDMS project, the HE scintillator was machined by Kharkov (V. Senchishin, Monocrystal Insitiute) and then sent to Protvino (Viktor Kryshkin and Anton Volkov) where the HE “megatiles” were assembled and tested. The structural elements of HE were also the responsibility of the RDMS project. The mechanical design was accomplished by NIKIET, including the very challenging connections to the endcap yoke. The brass absorber plates were rolled in IZHORA in St. Petersburg. The absorber was then machined and then pre-assembled in Minsk at the MZOR shop with liaison provided by Nikolai Shumeiko of Belarus.

The HE Brass The Russians used surplus naval artillery shells for their structure – a great idea. Swords Converted to Physics

HCAL Absorber The HB design was done by FNAL engineers, HE by Dubna engineers. The common idea for both HB and HE was a removeable "megatile" inserted from the periphery.

The HE Vertical Mount

The HE megatile All the scintillator and WLS was purchased by US CMS. The machining and assembly was done by Fermilab (HB) and Protvino (HE).

HF - Quartz/Steel The very forward HCAL (HF) used quartz/Cerenkov light and a steel absorber – due to the high radiation field. The Chelyabinsk group assembled the absorber using a US-FNAL design.

CERN Test Beam Modules of HB and HE were fully tested and calibrated in a CERN test beam and the data published by the full HCAL group

US and RDMS - Cooperation The HCAL project has been a great success in CMS. This happened in no small part because of the strong collaboration of the US and RDMS groups. Having established a pleasant atmosphere of mutual trust, fostered by trips to visit one another at Fermilab, Protvino, Kharkov, and Dubna the HCAL collaboration could reap the benefits. Many efforts were in common across the HCAL detectors. This made it possible to build a simple, robust and maintainable system. Having done so, and having tested it, the HCAL community continued to contribute to CMS physics – especially the Higgs boson discovery in 2012. And the HCAL collaboration continues as the LHC will run at higher luminosity in the future.

Igor Golutvin - 85 Congratulations to you Igor on a long and distinguished career in high energy physics. It was my great pleasure to work with you for many years on CMS. You have my greatest respect as a manager and a physicist. I wish you a great and productive future.