The Government is preparing security and protocol arrangements for US President Donald Trump to meet Taoiseach Micheál Martin and President Catherine Connolly in Dublin before he travels to his Doonbeg hotel by helicopter, the Irish Mail on Sunday has learned.

A secret internal briefing - seen by the MoS - details the infrastructure the Coalition is putting in place for Trump's visit to Dublin, before he travels to Co. Clare for the conclusion of the Irish Open golf tournament on Sunday, September 13, which is being hosted by his Doonbeg resort.

Earlier this month, the MoS revealed the US President will present the trophy to the tournament winner.

And Government protocol officers have been liaising with the US counterparts for a frantic few days of high-level events in Dublin before the tournament's climax.

According to the security briefing, it is expected Trump will touch down in Dublin on Friday, September 11 - the 25th anniversary of the 9/11 terrorist attacks on the US.

He is scheduled to turn the sod on the new US Embassy complex on the site of the old Jury's Hotel in Ballsbridge the following day - although this is understood to be a matter still being finalised. 

In a recent interview with the MoS, US Ambassador Ed Walsh said he expected the President to accede to his request to attend the ceremony.

Trump and Mr Walsh, who are close friends, are also real estate tycoons and understand the symbolism of the event.

Afterwards, it is planned the US president will meet with the Taoiseach in Dublin.

A separate meeting with President Catherine Connolly is also included in the schedule. 

A senior Government source involved in the organisation of the US president's visit told the MoS: 'Since Trump is expected to stay at the US Ambassador's residence in the Phoenix Park, near the President's residence at nearby Áras an Uachtaráin, this could be logistically achievable.'

They somewhat mischievously added: 'How the two of them - Trump and Connolly - get on, considering their markedly opposing political outlooks, is their business.'

'While Ms Connolly has been a vocal critic of US foreign policy, she did commit during the presidential election campaign to meet President Trump if it was required as part of her oficial duties.

After the embassy event and meetings, Trump is set to travel from Dublin, most likely from the Phoenix Park, in his Marine One Sikorsky helicopter.

It is expected the US president will make a similar entrance, timed for the conclusion of the Irish Open, to the one he made when visiting Doonbeg in 2019, when Marine One touched down on the hotel grounds accompanied by two escort helicopter gunships.

The golf at DP World Tour events usually ends at 6pm or 7pm, depending on whether a play off is required to determine the winner.

Local sources said they hope Trump's arrival by helicopter will minimise security disruption for spectators and players.

However, sources involved in his 2019 visit warned security arrangements are more complicated now following a series of high-profile attempts to assassinate the US President. Trump was grazed by the bullet fired by an assassin at a rally in Butler, Pennsylvania two years ago.

Sources said the maintenance of a required exclusion zone around the remote, rural Co. Clare venue, coupled with the holding of a major international golf tournament, is presenting significant security difficulties.

These are exacerbated by the additional complication of the 25th anniversary of the 9/11 attacks, which falls on the second day of the tournament.

Almost a year ago, the MoS revealed Doonbeg Golf Resort had been selected as the venue for this year's Amgen Irish Open.

In January, this newspaper also received confirmation from US and Irish sources in that a concurrent visit would be held.

The Taoiseach formally invited Mr Trump to visit Ireland at the time of the golf tournament during his visit to Washington in March.

When the MoS attended a private dinner with Trump at the Doonbeg resort in 2019, official consent to pass a US Secret Service 10-mile cordon had to be obtained.

All official visitors were required to pass through airport-type scanners.