CMS Level 1 Calorimeter Trigger Performance on Technical Proposal Physics
We examine the eeciency and rates of the CMS Calorimeter Level 1 Trigger as presented in the CMS Technical Proposal for selecting the events needed for use in the CMS physics program described in the Proposal. Speciic signals investigated include top decays to electrons, Standard Model Higgs decays to electrons and photons, signals from SUSY Higgs, and Gluino production. A variety of masses and SUSY parameters are investigated. The eeciencies are studied at the luminosity 10 33 cm ?2 s ?1 or 10 34 cm ?2 s ?1 depending on the expected rate of events as assumed in the CMS Technical proposal. A single set of Level 1 Calorimeter energy thresholds for electrons, jets and missing energy is selected to provide a 15 kHz rate at each of the two luminosity settings considered. It is shown that this set of cuts provides suuciently high eeciency and satisses CMS physics goals as stated in the Technical Proposal. We also explore the rate of B Physics signals that pass this high p t trigger.
Preliminary specifications of the baseline trigger algorithms
This document contains the specifications of the CMS baseline calorimeter trigger algorithms. Detailed information on the physics performance of the algorithms can be found in the technical notes listed at the end of the document. The present specifications provide the basis for further simulation studies with the aim of refining its details. It also provide the basis for the design studies, prototype developments and beam tests to be carried out in 1996-98. These specifications are preliminary and may be modified as a result of the foreseen tests and technical developments.
Badush Dam, NW Iraq : A Geological Study
The river Tigris flows from Turkey towards Iraq in its northwestern part dissecting the whole Iraqi territory. During 1981– 1986 a very large earth fill dam was constructed, which is Mosul Dam impounding the flow of the Tigris River. It is the largest dam in Iraq and one of the largest in the Middle East. The geological conditions of the dam site and surroundings, however, are not suitable due to thick exposures of the Fatha Formation, which consists of marl, clay, limestone and gypsum. The gypsum and limestone beds are highly karstified causing severe problems to the dam foundation. Mosul dam suffers from serious problems due to the presence of karstified rocks; therefore, the Ministry of Irrigation in Baghdad, decided to construct a protection dam downstream of Mosul Dam; it is called Badush Dam. The geological conditions at Badush Dam site are the same as those at Mosul Dam site, which means the foundations of the dam are located on karstified rocks. Therefore, grouting works were planned and designed and it was partly performed from the beginning of the construction in 1988. The construction of the dam; however, stopped in 1991 due to the consequences of the First Gulf War. The constructed parts of the dam are (30 – 40) %. In this study, we have presented the main problems, which will cause real danger to Badush Dam, if its construction is re-started, and we have suggested many requirements to avoid any hazard that may cause the collapse of Badush Dam.