TY  - CONF
AU  - Bosland, P.
AU  - Arcambal, C.
AU  - Ardellier, F.
AU  - Berry, S.
AU  - Bouygues, A.
AU  - Cenni, E.
AU  - Darve, C.
AU  - Devanz, G.
AU  - Hamelin, T.
AU  - Hanus, X.
AU  - Michelato, P.
AU  - Olivier, G.
AU  - Piquet, O.
AU  - Poupeau, J.P.
AU  - Renard, B.
AU  - Sahuquet, P.
AU  - Thermeau, J.P.
ED  - Boland, Mark
ED  - Tanaka, Hitoshi
ED  - Button, David
ED  - Dowd, Rohan
ED  - Schaa, Volker RW
ED  - Tan, Eugene
TI  - Tests at High RF Power of the ESS Medium Beta Cryomodule Demonstrator
J2  - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019
CY  - Melbourne, Australia
T2  - International Particle Accelerator Conference
T3  - 10
LA  - english
AB  - CEA is in charge of the 30 elliptical medium and high-beta cryomodules to be installed in the ESS tunnel in Lund, Sweden. Before launching the assembly of the series cryomodules, CEA developed a medium-beta cryomodule technology demonstrator in a collaboration with IPNO, LASA and ESS. This paper briefly presents the cryomodule assembly and summarizes the main results of the high RF power tests performed in 2018 in a dedicated test stand in CEA Saclay. The main ESS requirements were reached: E_{acc} = 16.7 MV/m in cavities, Pforward = 1.1 MW in power couplers, RF pulses length = 3.6 ms at 14 Hz. The piezo tuners efficiently compensated the Lorentz forces detuning and could stabilize the accelerating field better than 1% over the full length of the expected ESS 2.86 ms beam pulse without any LLRF regulation system. Following this successful validation CEA started the assembly of the first ESS medium-beta series cryomodule
PB  - JACoW Publishing
CP  - Geneva, Switzerland
SP  - 1940
EP  - 1943
KW  - cavity
KW  - cryomodule
KW  - cryogenics
KW  - linac
KW  - status
DA  - 2019/06
PY  - 2019
SN  - 978-3-95450-208-0
DO  - DOI: 10.18429/JACoW-IPAC2019-TUPTS006
UR  - http://jacow.org/ipac2019/papers/tupts006.pdf
ER  - 

TY  - CONF
AU  - Sertore, D.
AU  - Guerini Rocco, G.
AU  - Michelato, P.
AU  - Mohanty, S.K.
AU  - Monaco, L.
AU  - Pagani, C.
ED  - Boland, Mark
ED  - Tanaka, Hitoshi
ED  - Button, David
ED  - Dowd, Rohan
ED  - Schaa, Volker RW
ED  - Tan, Eugene
TI  - Photocathode Activities at INFN LASA
J2  - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019
CY  - Melbourne, Australia
T2  - International Particle Accelerator Conference
T3  - 10
LA  - english
AB  - We present the activity on alkali antimonide photocathodes at INFN LASA. The long term goal is to transfer to these photocathodes the know-how acquired in the successful development of cesium telluride photocathodes, nowadays used in many leading FEL facilities and accelerator complex. In this paper we present and discuss the results so far obtained on alkali antimonide films grown in our R&D system and the status of the new preparation system specifically designed for these sensitive materials.
PB  - JACoW Publishing
CP  - Geneva, Switzerland
SP  - 2203
EP  - 2206
KW  - cathode
KW  - operation
KW  - electron
KW  - laser
KW  - gun
DA  - 2019/06
PY  - 2019
SN  - 978-3-95450-208-0
DO  - DOI: 10.18429/JACoW-IPAC2019-TUPTS117
UR  - http://jacow.org/ipac2019/papers/tupts117.pdf
ER  - 

TY  - CONF
AU  - Bertucci, M.
AU  - Bignami, A.
AU  - Bosotti, A.
AU  - Chiodini, M.
AU  - D'Ambros, A.
AU  - Michelato, P.
AU  - Monaco, L.
AU  - Pagani, C.
AU  - Paparella, R.
AU  - Rizzetto, D.
AU  - Rizzi, M.
AU  - Sagliano, L.
AU  - Sertore, D.
ED  - Boland, Mark
ED  - Tanaka, Hitoshi
ED  - Button, David
ED  - Dowd, Rohan
ED  - Schaa, Volker RW
ED  - Tan, Eugene
TI  - LASA Activities on Surface Treatment of Low-beta Elliptical Cavities
J2  - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019
CY  - Melbourne, Australia
T2  - International Particle Accelerator Conference
T3  - 10
LA  - english
AB  - This paper describes the efforts made by LASA on the development of surface treatments for low-beta elliptical cavities, for the current series production of ESS and the foreseen series production of PIP-II. The traditional techniques of buffered chemical polishing and electropolishing are here discussed taking into account the industrial environment, the practical issues due to the size and geometry of such cavities and according to the required qualification values for quality factor and accelerating gradient.
PB  - JACoW Publishing
CP  - Geneva, Switzerland
SP  - 2207
EP  - 2210
KW  - cavity
KW  - SRF
KW  - FEL
KW  - cathode
KW  - superconductivity
DA  - 2019/06
PY  - 2019
SN  - 978-3-95450-208-0
DO  - DOI: 10.18429/JACoW-IPAC2019-TUPTS118
UR  - http://jacow.org/ipac2019/papers/tupts118.pdf
ER  - 

TY  - CONF
AU  - Michelato, P.
AU  - Aurnia, S.
AU  - Bertucci, M.
AU  - Bignami, A.
AU  - Bosotti, A.
AU  - Chiodini, M.
AU  - D'Ambros, A.
AU  - Leonardi, O.
AU  - Miraglia, A.
AU  - Monaco, L.
AU  - Pagani, C.
AU  - Paparella, R.
AU  - Sagliano, L.
AU  - Sertore, D.
AU  - Vecchio, G.
ED  - Boland, Mark
ED  - Tanaka, Hitoshi
ED  - Button, David
ED  - Dowd, Rohan
ED  - Schaa, Volker RW
ED  - Tan, Eugene
TI  - Status of the ESS Medium Beta Cavities at INFN - LASA
J2  - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019
CY  - Melbourne, Australia
T2  - International Particle Accelerator Conference
T3  - 10
LA  - english
AB  - INFN-LASA contributes in-kind to the European Spallation Source ERIC with 36 6-cell cavities for the Medium Beta section of the Superconducting Linac. After having developed the electromagnetic and mechanical models, few prototypes have been produced and tested. Based on this experience, we are now supervisioning the cavity production at the industry, the resonators test at DESY and the delivery to CEA at Saclay. In this paper, we report on the status of the overall INFN-LASA contribution including also document handling, interface data exchange and QA/QC.
PB  - JACoW Publishing
CP  - Geneva, Switzerland
SP  - 2211
EP  - 2214
KW  - cavity
KW  - status
KW  - controls
KW  - HOM
KW  - niobium
DA  - 2019/06
PY  - 2019
SN  - 978-3-95450-208-0
DO  - DOI: 10.18429/JACoW-IPAC2019-TUPTS119
UR  - http://jacow.org/ipac2019/papers/tupts119.pdf
ER  - 

TY  - CONF
AU  - Paparella, R.
AU  - Bertucci, M.
AU  - Bignami, A.
AU  - Bosotti, A.
AU  - Chen, J.F.
AU  - Chiodini, M.
AU  - D'Ambros, A.
AU  - Michelato, P.
AU  - Monaco, L.
AU  - Pagani, C.
AU  - Sagliano, L.
AU  - Sertore, D.
ED  - Boland, Mark
ED  - Tanaka, Hitoshi
ED  - Button, David
ED  - Dowd, Rohan
ED  - Schaa, Volker RW
ED  - Tan, Eugene
TI  - Status of the PIP-II Activities at INFN-LASA
J2  - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019
CY  - Melbourne, Australia
T2  - International Particle Accelerator Conference
T3  - 10
LA  - english
AB  - INFN-LASA joined the international effort for the PIP-II project in Fermilab and it is expected to build the 650 MHz superconducting cavities required by the low-beta section of the 800 MeV front-end proton linac, as recently signed by US DOE and Italian MIUR. After developing the electro-magnetic and mechanical design, INFN-Milano started the prototyping phase by producing five single-cells and two complete 5-cells cavities. In a joint effort with Fermilab the road for the optimal surface treatment for such low-beta resonators has started in order to approach the existing state-of-the-art performances of beta 1 cavities. This paper reports the status of PIP-II activities at INFN-LASA summarizing manufacturing experience and preliminary experimental results.
PB  - JACoW Publishing
CP  - Geneva, Switzerland
SP  - 2215
EP  - 2218
KW  - cavity
KW  - niobium
KW  - linac
KW  - interface
KW  - SRF
DA  - 2019/06
PY  - 2019
SN  - 978-3-95450-208-0
DO  - DOI: 10.18429/JACoW-IPAC2019-TUPTS120
UR  - http://jacow.org/ipac2019/papers/tupts120.pdf
ER  - 

TY  - CONF
AU  - Bosotti, A.
AU  - Bertucci, M.
AU  - Bignami, A.
AU  - Michelato, P.
AU  - Monaco, L.
AU  - Paparella, R.
AU  - Reschke, D.
AU  - Sertore, D.
AU  - Sulimov, A.
AU  - Wiencek, M.
ED  - Boland, Mark
ED  - Tanaka, Hitoshi
ED  - Button, David
ED  - Dowd, Rohan
ED  - Schaa, Volker RW
ED  - Tan, Eugene
TI  - Vertical Test of ESS Medium Beta Cavities
J2  - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019
CY  - Melbourne, Australia
T2  - International Particle Accelerator Conference
T3  - 10
LA  - english
AB  - The Medium beta (β=0.67) section of the European Spallation Source (ESS) Linac is composed of 36 six-cell elliptical superconducting (SC) cavities. As a part to the in kind contribution of Italy to the ESS project, INFN-LASA is in charge of the development and of the industrial production of the whole set of 36 resonators plus two spares. The production activity is now ongoing at ZANON. To qualify the cavities power tests in vertical cryostat has been committed to DESY. During the qualification tests, where the cavities provided with He tanks are pushed to their electromagnetic limits, recording their main electromagnetics parameters such as quality factor Q₀ vs E_{acc}. In this paper we report about the qualification tests performed on the first part of the quality production.
PB  - JACoW Publishing
CP  - Geneva, Switzerland
SP  - 2852
EP  - 2855
KW  - cavity
KW  - HOM
KW  - cryomodule
KW  - vacuum
KW  - linac
DA  - 2019/06
PY  - 2019
SN  - 978-3-95450-208-0
DO  - DOI: 10.18429/JACoW-IPAC2019-WEPRB023
UR  - http://jacow.org/ipac2019/papers/weprb023.pdf
ER  -